diff --git a/src/d_clisrv.c b/src/d_clisrv.c
index b9f8dd58..40cd17dc 100644
--- a/src/d_clisrv.c
+++ b/src/d_clisrv.c
@@ -1228,6 +1228,7 @@ static boolean CL_SendJoin(void)
 		localplayers++;
 	if (splitscreen4)
 		localplayers++;
+
 	netbuffer->u.clientcfg.localplayers = localplayers;
 	netbuffer->u.clientcfg.version = VERSION;
 	netbuffer->u.clientcfg.subversion = SUBVERSION;
@@ -2324,9 +2325,7 @@ static void Command_connect(void)
 			CONS_Alert(CONS_ERROR, M_GetText("There is no network driver\n"));
 	}
 
-	splitscreen = false;
-	splitscreen3 = false;
-	splitscreen4 = false;
+	splitscreen = splitscreen3 = splitscreen4 = false;
 	SplitScreen_OnChange();
 	botingame = false;
 	botskin = 0;
@@ -2708,7 +2707,7 @@ static void Got_KickCmd(UINT8 **p, INT32 playernum)
 
 	// Is playernum authorized to make this kick?
 	if (playernum != serverplayer && !IsPlayerAdmin(playernum)
-		&& !(playerpernode[playernode[playernum]] == 2
+		&& !(playerpernode[playernode[playernum]] >= 2
 		&& nodetoplayer2[playernode[playernum]] == pnum
 		&& nodetoplayer3[playernode[playernum]] == pnum
 		&& nodetoplayer4[playernode[playernum]] == pnum))
@@ -3078,7 +3077,7 @@ static inline void SV_AddNode(INT32 node)
 static void Got_AddPlayer(UINT8 **p, INT32 playernum)
 {
 	INT16 node, newplayernum;
-	boolean splitscreenplayer;
+	UINT8 splitscreenplayer = 0;
 
 	if (playernum != serverplayer && !IsPlayerAdmin(playernum))
 	{
@@ -3097,8 +3096,8 @@ static void Got_AddPlayer(UINT8 **p, INT32 playernum)
 
 	node = READUINT8(*p);
 	newplayernum = READUINT8(*p);
-	splitscreenplayer = newplayernum & 0x80;
-	newplayernum &= ~0x80;
+	splitscreenplayer = newplayernum/MAXPLAYERS;
+	newplayernum %= MAXPLAYERS;
 
 	// Clear player before joining, lest some things get set incorrectly
 	// HACK: don't do this for splitscreen, it relies on preset values
@@ -3116,11 +3115,13 @@ static void Got_AddPlayer(UINT8 **p, INT32 playernum)
 	if (node == mynode)
 	{
 		playernode[newplayernum] = 0; // for information only
-		if (!splitscreenplayer)
+		if (splitscreenplayer == 0)
 		{
 			consoleplayer = newplayernum;
 			displayplayer = newplayernum;
 			secondarydisplayplayer = newplayernum;
+			thirddisplayplayer = newplayernum;
+			fourthdisplayplayer = newplayernum;
 			DEBFILE("spawning me\n");
 			// Apply player flags as soon as possible!
 			players[newplayernum].pflags &= ~(PF_FLIPCAM|PF_ANALOGMODE);
@@ -3131,16 +3132,39 @@ static void Got_AddPlayer(UINT8 **p, INT32 playernum)
 		}
 		else
 		{
-			secondarydisplayplayer = newplayernum;
-			DEBFILE("spawning my brother\n");
-			if (botingame)
-				players[newplayernum].bot = 1;
-			// Same goes for player 2 when relevant
-			players[newplayernum].pflags &= ~(PF_FLIPCAM|PF_ANALOGMODE);
-			if (cv_flipcam2.value)
-				players[newplayernum].pflags |= PF_FLIPCAM;
-			if (cv_analog2.value)
-				players[newplayernum].pflags |= PF_ANALOGMODE;
+			if (splitscreenplayer == 2)
+			{
+				thirddisplayplayer = newplayernum;
+				DEBFILE("spawning my sister\n");
+				players[newplayernum].pflags &= ~(PF_FLIPCAM|PF_ANALOGMODE);
+				if (cv_flipcam3.value)
+					players[newplayernum].pflags |= PF_FLIPCAM;
+				if (cv_analog3.value)
+					players[newplayernum].pflags |= PF_ANALOGMODE;
+			}
+			else if (splitscreenplayer == 3)
+			{
+				fourthdisplayplayer = newplayernum;
+				DEBFILE("spawning my trusty pet dog\n");
+				players[newplayernum].pflags &= ~(PF_FLIPCAM|PF_ANALOGMODE);
+				if (cv_flipcam4.value)
+					players[newplayernum].pflags |= PF_FLIPCAM;
+				if (cv_analog4.value)
+					players[newplayernum].pflags |= PF_ANALOGMODE;
+			}
+			else
+			{
+				secondarydisplayplayer = newplayernum;
+				DEBFILE("spawning my brother\n");
+				if (botingame)
+					players[newplayernum].bot = 1;
+				// Same goes for player 2 when relevant
+				players[newplayernum].pflags &= ~(PF_FLIPCAM|PF_ANALOGMODE);
+				if (cv_flipcam2.value)
+					players[newplayernum].pflags |= PF_FLIPCAM;
+				if (cv_analog2.value)
+					players[newplayernum].pflags |= PF_ANALOGMODE;
+			}
 		}
 		D_SendPlayerConfig();
 		addedtogame = true;
@@ -3182,7 +3206,8 @@ static boolean SV_AddWaitingPlayers(void)
 			for (; newplayernum < MAXPLAYERS; newplayernum++)
 			{
 				for (n = 0; n < MAXNETNODES; n++)
-					if (nodetoplayer[n] == newplayernum || nodetoplayer2[n] == newplayernum)
+					if (nodetoplayer[n] == newplayernum || nodetoplayer2[n] == newplayernum
+						|| nodetoplayer3[n] == newplayernum || nodetoplayer4[n] == newplayernum)
 						break;
 				if (n == MAXNETNODES)
 					break;
@@ -3201,7 +3226,17 @@ static boolean SV_AddWaitingPlayers(void)
 			else if (playerpernode[node] < 2)
 			{
 				nodetoplayer2[node] = newplayernum;
-				buf[1] |= 0x80;
+				buf[1] += MAXPLAYERS;
+			}
+			else if (playerpernode[node] < 3)
+			{
+				nodetoplayer3[node] = newplayernum;
+				buf[1] += MAXPLAYERS*2;
+			}
+			else if (playerpernode[node] < 4)
+			{
+				nodetoplayer4[node] = newplayernum;
+				buf[1] += MAXPLAYERS*3;
 			}
 			playerpernode[node]++;
 
@@ -3804,10 +3839,17 @@ FILESTAMP
 			else if (resynch_score[node])
 				--resynch_score[node];
 			break;
-		case PT_TEXTCMD2: // splitscreen special
-			netconsole = nodetoplayer2[node];
-			/* FALLTHRU */
 		case PT_TEXTCMD:
+		case PT_TEXTCMD2: // splitscreen special
+		case PT_TEXTCMD3:
+		case PT_TEXTCMD4:
+			if (netbuffer->packettype == PT_TEXTCMD2)
+				netconsole = nodetoplayer2[node];
+			else if (netbuffer->packettype == PT_TEXTCMD3)
+				netconsole = nodetoplayer3[node];
+			else if (netbuffer->packettype == PT_TEXTCMD4)
+				netconsole = nodetoplayer4[node];
+
 			if (client)
 				break;
 
@@ -3896,6 +3938,20 @@ FILESTAMP
 					SendNetXCmd(XD_KICK, &buf, 2);
 					nodetoplayer2[node] = -1;
 				}
+				if (nodetoplayer3[node] != -1 && nodetoplayer3[node] >= 0
+					&& playeringame[(UINT8)nodetoplayer3[node]])
+				{
+					buf[0] = nodetoplayer3[node];
+					SendNetXCmd(XD_KICK, &buf, 2);
+					nodetoplayer3[node] = -1;
+				}
+				if (nodetoplayer4[node] != -1 && nodetoplayer4[node] >= 0
+					&& playeringame[(UINT8)nodetoplayer4[node]])
+				{
+					buf[0] = nodetoplayer4[node];
+					SendNetXCmd(XD_KICK, &buf, 2);
+					nodetoplayer4[node] = -1;
+				}
 			}
 			Net_CloseConnection(node);
 			nodeingame[node] = false;
diff --git a/src/d_clisrv.h b/src/d_clisrv.h
index c4c3836d..c15aa8a7 100644
--- a/src/d_clisrv.h
+++ b/src/d_clisrv.h
@@ -66,6 +66,8 @@ typedef enum
 
 	PT_TEXTCMD,       // Extra text commands from the client.
 	PT_TEXTCMD2,      // Splitscreen text commands.
+	PT_TEXTCMD3,
+	PT_TEXTCMD4,
 	PT_CLIENTJOIN,    // Client wants to join; used in start game.
 	PT_NODETIMEOUT,   // Packet sent to self if the connection times out.
 	PT_RESYNCHING,    // Packet sent to resync players.
@@ -107,6 +109,7 @@ typedef struct
 	ticcmd_t cmd, cmd2;
 } ATTRPACK client2cmd_pak;
 
+/*
 // Splitscreen3 packet
 // WARNING: must have the same format of clientcmd_pak, for more easy use
 typedef struct
@@ -126,6 +129,7 @@ typedef struct
 	INT16 consistancy;
 	ticcmd_t cmd, cmd2, cmd3, cmd4;
 } ATTRPACK client4cmd_pak;
+*/
 
 #ifdef _MSC_VER
 #pragma warning(disable :  4200)
@@ -417,8 +421,8 @@ typedef struct
 	{
 		clientcmd_pak clientpak;            //         144 bytes
 		client2cmd_pak client2pak;          //         200 bytes
-		client3cmd_pak client3pak;          //         256 bytes(?)
-		client4cmd_pak client4pak;          //         312 bytes(?)
+		//client3cmd_pak client3pak;          //         256 bytes(?)
+		//client4cmd_pak client4pak;          //         312 bytes(?)
 		servertics_pak serverpak;           //      132495 bytes (more around 360, no?)
 		serverconfig_pak servercfg;         //         773 bytes
 		resynchend_pak resynchend;          //
diff --git a/src/d_net.c b/src/d_net.c
index 643c41ac..32dc0217 100644
--- a/src/d_net.c
+++ b/src/d_net.c
@@ -892,6 +892,8 @@ static void DebugPrintpacket(const char *header)
 			break;
 		case PT_TEXTCMD:
 		case PT_TEXTCMD2:
+		case PT_TEXTCMD3:
+		case PT_TEXTCMD4:
 			fprintf(debugfile, "    length %d\n    ", netbuffer->u.textcmd[0]);
 			fprintf(debugfile, "[%s]", netxcmdnames[netbuffer->u.textcmd[1] - 1]);
 			fprintfstringnewline((char *)netbuffer->u.textcmd + 2, netbuffer->u.textcmd[0] - 1);
diff --git a/src/d_netcmd.c b/src/d_netcmd.c
index 20316d99..6a454f46 100644
--- a/src/d_netcmd.c
+++ b/src/d_netcmd.c
@@ -1045,11 +1045,12 @@ static void CleanupPlayerName(INT32 playernum, const char *newname)
 	// spaces may have been removed
 	if (playernum == consoleplayer)
 		CV_StealthSet(&cv_playername, tmpname);
-	else if (playernum == secondarydisplayplayer
-		|| (!netgame && playernum == 1))
-	{
+	else if (playernum == secondarydisplayplayer || (!netgame && playernum == 1))
 		CV_StealthSet(&cv_playername2, tmpname);
-	}
+	else if (playernum == thirddisplayplayer || (!netgame && playernum == 2))
+		CV_StealthSet(&cv_playername3, tmpname);
+	else if (playernum == fourthdisplayplayer || (!netgame && playernum == 3))
+		CV_StealthSet(&cv_playername4, tmpname);
 	else I_Assert(((void)"CleanupPlayerName used on non-local player", 0));
 
 	Z_Free(buf);
@@ -1157,11 +1158,15 @@ static void ForceAllSkins(INT32 forcedskin)
 				CV_StealthSet(&cv_skin, skins[forcedskin].name);
 			else if (i == secondarydisplayplayer)
 				CV_StealthSet(&cv_skin2, skins[forcedskin].name);
+			else if (i == thirddisplayplayer)
+				CV_StealthSet(&cv_skin3, skins[forcedskin].name);
+			else if (i == fourthdisplayplayer)
+				CV_StealthSet(&cv_skin4, skins[forcedskin].name);
 		}
 	}
 }
 
-static INT32 snacpending = 0, snac2pending = 0, chmappending = 0;
+static INT32 snacpending = 0, snac2pending = 0, snac3pending = 0, snac4pending = 0, chmappending = 0;
 
 // name, color, or skin has changed
 //
@@ -1284,7 +1289,7 @@ static void SendNameAndColor2(void)
 {
 	INT32 secondplaya;
 
-	if ((!splitscreen || !splitscreen3 || !splitscreen4) && !botingame)
+	if (!(splitscreen || splitscreen3 || splitscreen4) && !botingame)
 		return; // can happen if skin2/color2/name2 changed
 
 	if (secondarydisplayplayer != consoleplayer)
@@ -1381,8 +1386,8 @@ static void SendNameAndColor3(void)
 {
 	INT32 thirdplaya;
 
-	if ((!splitscreen3 || !splitscreen4) && !botingame)
-		return; // can happen if skin2/color2/name2 changed
+	if (!(splitscreen3 || splitscreen4))
+		return; // can happen if skin3/color3/name3 changed
 
 	if (thirddisplayplayer != consoleplayer)
 		thirdplaya = thirddisplayplayer;
@@ -1414,15 +1419,7 @@ static void SendNameAndColor3(void)
 		return;
 
 	// If you're not in a netgame, merely update the skin, color, and name.
-	if (botingame)
-	{
-		players[thirdplaya].skincolor = botcolor;
-		if (players[thirdplaya].mo)
-			players[thirdplaya].mo->color = players[thirdplaya].skincolor;
-		SetPlayerSkinByNum(thirdplaya, botskin-1);
-		return;
-	}
-	else if (!netgame && !modeattacking)
+	if (!netgame && !modeattacking)
 	{
 		INT32 foundskin;
 
@@ -1445,7 +1442,7 @@ static void SendNameAndColor3(void)
 		{
 			boolean notsame;
 
-			cv_skin2.value = foundskin;
+			cv_skin3.value = foundskin;
 
 			notsame = (cv_skin3.value != players[thirdplaya].skin);
 
@@ -1478,7 +1475,7 @@ static void SendNameAndColor4(void)
 {
 	INT32 fourthplaya;
 
-	if (!splitscreen4 && !botingame)
+	if (!splitscreen4)
 		return; // can happen if skin4/color4/name4 changed
 
 	if (fourthdisplayplayer != consoleplayer)
@@ -1586,9 +1583,13 @@ static void Got_NameAndColor(UINT8 **cp, INT32 playernum)
 		snacpending--;
 	else if (playernum == secondarydisplayplayer)
 		snac2pending--;
+	else if (playernum == thirddisplayplayer)
+		snac3pending--;
+	else if (playernum == fourthdisplayplayer)
+		snac4pending--;
 
 #ifdef PARANOIA
-	if (snacpending < 0 || snac2pending < 0)
+	if (snacpending < 0 || snac2pending < 0 || snac3pending < 0 || snac4pending < 0)
 		I_Error("snacpending negative!");
 #endif
 
@@ -1606,7 +1607,8 @@ static void Got_NameAndColor(UINT8 **cp, INT32 playernum)
 		p->mo->color = (UINT8)p->skincolor;
 
 	// normal player colors
-	if (server && (p != &players[consoleplayer] && p != &players[secondarydisplayplayer]))
+	if (server && (p != &players[consoleplayer] && p != &players[secondarydisplayplayer]
+		&& p != &players[thirddisplayplayer] && p != &players[fourthdisplayplayer]))
 	{
 		boolean kick = false;
 
@@ -1645,6 +1647,10 @@ static void Got_NameAndColor(UINT8 **cp, INT32 playernum)
 			CV_StealthSet(&cv_skin, skins[forcedskin].name);
 		else if (playernum == secondarydisplayplayer)
 			CV_StealthSet(&cv_skin2, skins[forcedskin].name);
+		else if (playernum == thirddisplayplayer)
+			CV_StealthSet(&cv_skin3, skins[forcedskin].name);
+		else if (playernum == fourthdisplayplayer)
+			CV_StealthSet(&cv_skin4, skins[forcedskin].name);
 	}
 	else
 		SetPlayerSkinByNum(playernum, skin);
@@ -2934,6 +2940,10 @@ static void Got_Teamchange(UINT8 **cp, INT32 playernum)
 				CV_SetValue(&cv_playercolor, NetPacket.packet.newteam + 5);
 			else if (playernum == secondarydisplayplayer)
 				CV_SetValue(&cv_playercolor2, NetPacket.packet.newteam + 5);
+			else if (playernum == thirddisplayplayer)
+				CV_SetValue(&cv_playercolor3, NetPacket.packet.newteam + 5);
+			else if (playernum == fourthdisplayplayer)
+				CV_SetValue(&cv_playercolor4, NetPacket.packet.newteam + 5);
 		}
 	}
 
@@ -4607,7 +4617,7 @@ static void Skin_OnChange(void)
   */
 static void Skin2_OnChange(void)
 {
-	if (!Playing() || (!splitscreen || !splitscreen3 || !splitscreen4))
+	if (!Playing() || !(splitscreen || splitscreen3 || splitscreen4))
 		return; // do whatever you want
 
 	if (CanChangeSkin(secondarydisplayplayer) && !P_PlayerMoving(secondarydisplayplayer))
@@ -4621,7 +4631,7 @@ static void Skin2_OnChange(void)
 
 static void Skin3_OnChange(void)
 {
-	if (!Playing() || (!splitscreen3 || !splitscreen4))
+	if (!Playing() || !(splitscreen3 || splitscreen4))
 		return; // do whatever you want
 
 	if (CanChangeSkin(thirddisplayplayer) && !P_PlayerMoving(thirddisplayplayer))
@@ -4681,7 +4691,7 @@ static void Color_OnChange(void)
   */
 static void Color2_OnChange(void)
 {
-	if (!Playing() || (!splitscreen || !splitscreen3 || !splitscreen4))
+	if (!Playing() || !(splitscreen || splitscreen3 || splitscreen4))
 		return; // do whatever you want
 
 	if (!P_PlayerMoving(secondarydisplayplayer))
@@ -4698,7 +4708,7 @@ static void Color2_OnChange(void)
 
 static void Color3_OnChange(void)
 {
-	if (!Playing() || (!splitscreen3 || !splitscreen4))
+	if (!Playing() || !(splitscreen3 || splitscreen4))
 		return; // do whatever you want
 
 	if (!P_PlayerMoving(thirddisplayplayer))
diff --git a/src/dehacked.c b/src/dehacked.c
index c4c8fed9..e93ab35a 100644
--- a/src/dehacked.c
+++ b/src/dehacked.c
@@ -8743,6 +8743,12 @@ static inline int lib_getenum(lua_State *L)
 	} else if (fastcmp(word,"splitscreen")) {
 		lua_pushboolean(L, splitscreen);
 		return 1;
+	} else if (fastcmp(word,"splitscreen3")) {
+		lua_pushboolean(L, splitscreen3);
+		return 1;
+	} else if (fastcmp(word,"splitscreen4")) {
+		lua_pushboolean(L, splitscreen4);
+		return 1;
 	} else if (fastcmp(word,"gamecomplete")) {
 		lua_pushboolean(L, gamecomplete);
 		return 1;
diff --git a/src/g_game.c b/src/g_game.c
index f2fcbc8e..65f80109 100644
--- a/src/g_game.c
+++ b/src/g_game.c
@@ -1709,7 +1709,7 @@ static void Analog2_OnChange(void)
 
 static void Analog3_OnChange(void)
 {
-	if (!((splitscreen3 || splitscreen4) || botingame) || !cv_cam3_dist.string)
+	if (!(splitscreen3 || splitscreen4) || !cv_cam3_dist.string)
 		return;
 
 	// cameras are not initialized at this point
@@ -1729,7 +1729,7 @@ static void Analog3_OnChange(void)
 
 static void Analog4_OnChange(void)
 {
-	if (!(splitscreen4 || botingame) || !cv_cam4_dist.string)
+	if (!(splitscreen4) || !cv_cam4_dist.string)
 		return;
 
 	// cameras are not initialized at this point
@@ -2459,6 +2459,10 @@ void G_PlayerReborn(INT32 player)
 				CV_SetValue(&cv_playercolor, skincolor_redteam);
 			else if (p == &players[secondarydisplayplayer])
 				CV_SetValue(&cv_playercolor2, skincolor_redteam);
+			else if (p == &players[thirddisplayplayer])
+				CV_SetValue(&cv_playercolor3, skincolor_redteam);
+			else if (p == &players[fourthdisplayplayer])
+				CV_SetValue(&cv_playercolor4, skincolor_redteam);
 		}
 		else if (p->ctfteam == 2 && p->skincolor != skincolor_blueteam)
 		{
@@ -2466,6 +2470,10 @@ void G_PlayerReborn(INT32 player)
 				CV_SetValue(&cv_playercolor, skincolor_blueteam);
 			else if (p == &players[secondarydisplayplayer])
 				CV_SetValue(&cv_playercolor2, skincolor_blueteam);
+			else if (p == &players[thirddisplayplayer])
+				CV_SetValue(&cv_playercolor3, skincolor_blueteam);
+			else if (p == &players[fourthdisplayplayer])
+				CV_SetValue(&cv_playercolor4, skincolor_blueteam);
 		}
 	}
 }
diff --git a/src/k_kart.c b/src/k_kart.c
index f79b5f1e..47e14ee4 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -3589,8 +3589,14 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
 
 		if (player->kartstuff[k_bootimer] > 0)
 		{
-			if ((player == &players[displayplayer] || (splitscreen && player == &players[secondarydisplayplayer]))
-				|| (!(player == &players[displayplayer] || (splitscreen && player == &players[secondarydisplayplayer]))
+			if ((player == &players[displayplayer]
+				|| ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
+				|| ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+				|| (splitscreen4 && player == &players[fourthdisplayplayer]))
+				|| (!(player == &players[displayplayer]
+				|| ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
+				|| ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+				|| (splitscreen4 && player == &players[fourthdisplayplayer]))
 				&& (player->kartstuff[k_bootimer] < 1*TICRATE/2 || player->kartstuff[k_bootimer] > bootime-(1*TICRATE/2))))
 			{
 				if (leveltime & 1)
diff --git a/src/lua_playerlib.c b/src/lua_playerlib.c
index 4679c0c5..47560847 100644
--- a/src/lua_playerlib.c
+++ b/src/lua_playerlib.c
@@ -381,6 +381,10 @@ static int player_set(lua_State *L)
 			localaiming = plr->aiming;
 		else if (plr == &players[secondarydisplayplayer])
 			localaiming2 = plr->aiming;
+		else if (plr == &players[thirddisplayplayer])
+			localaiming3 = plr->aiming;
+		else if (plr == &players[fourthdisplayplayer])
+			localaiming4 = plr->aiming;
 	}
 	else if (fastcmp(field,"health"))
 		plr->health = (INT32)luaL_checkinteger(L, 3);
diff --git a/src/p_enemy.c b/src/p_enemy.c
index 2b010327..46fc973f 100644
--- a/src/p_enemy.c
+++ b/src/p_enemy.c
@@ -4075,7 +4075,7 @@ void A_OverlayThink(mobj_t *actor)
 	if (!actor->target)
 		return;
 
-	if (!splitscreen && rendermode != render_soft)
+	if (!(splitscreen || splitscreen3 || splitscreen4) && rendermode != render_soft)
 	{
 		angle_t viewingangle;
 
diff --git a/src/p_inter.c b/src/p_inter.c
index 1f86a869..984eb055 100644
--- a/src/p_inter.c
+++ b/src/p_inter.c
@@ -62,8 +62,12 @@ void P_ForceConstant(const BasicFF_t *FFInfo)
 	ConstantQuake.Magnitude = FFInfo->Magnitude;
 	if (FFInfo->player == &players[consoleplayer])
 		I_Tactile(ConstantForce, &ConstantQuake);
-	else if (splitscreen && FFInfo->player == &players[secondarydisplayplayer])
+	else if ((splitscreen || splitscreen3 || splitscreen4) && FFInfo->player == &players[secondarydisplayplayer])
 		I_Tactile2(ConstantForce, &ConstantQuake);
+	else if ((splitscreen3 || splitscreen4) && FFInfo->player == &players[thirddisplayplayer])
+		I_Tactile3(ConstantForce, &ConstantQuake);
+	else if (splitscreen4 && FFInfo->player == &players[fourthdisplayplayer])
+		I_Tactile4(ConstantForce, &ConstantQuake);
 }
 void P_RampConstant(const BasicFF_t *FFInfo, INT32 Start, INT32 End)
 {
@@ -79,8 +83,12 @@ void P_RampConstant(const BasicFF_t *FFInfo, INT32 Start, INT32 End)
 	RampQuake.End       = End;
 	if (FFInfo->player == &players[consoleplayer])
 		I_Tactile(ConstantForce, &RampQuake);
-	else if (splitscreen && FFInfo->player == &players[secondarydisplayplayer])
+	else if ((splitscreen || splitscreen3 || splitscreen4) && FFInfo->player == &players[secondarydisplayplayer])
 		I_Tactile2(ConstantForce, &RampQuake);
+	else if ((splitscreen3 || splitscreen4) && FFInfo->player == &players[thirddisplayplayer])
+		I_Tactile3(ConstantForce, &RampQuake);
+	else if (splitscreen4 && FFInfo->player == &players[fourthdisplayplayer])
+		I_Tactile4(ConstantForce, &RampQuake);
 }
 
 
@@ -2245,6 +2253,10 @@ void P_KillMobj(mobj_t *target, mobj_t *inflictor, mobj_t *source)
 			// added : 22-02-98: recenter view for next life...
 			localaiming2 = 0;
 		}
+		if (target->player == &players[thirddisplayplayer])
+			localaiming3 = 0;
+		if (target->player == &players[fourthdisplayplayer])
+			localaiming4 = 0;
 
 		//tag deaths handled differently in suicide cases. Don't count spectators!
 		if (G_TagGametype()
diff --git a/src/p_map.c b/src/p_map.c
index 00108372..0e9a6e02 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -1351,6 +1351,10 @@ static boolean PIT_CheckThing(mobj_t *thing)
 					localangle = thing->angle;
 				else if (thing->player == &players[secondarydisplayplayer])
 					localangle2 = thing->angle;
+				else if (thing->player == &players[thirddisplayplayer])
+					localangle3 = thing->angle;
+				else if (thing->player == &players[fourthdisplayplayer])
+					localangle4 = thing->angle;
 			}
 
 			return true;
diff --git a/src/p_mobj.c b/src/p_mobj.c
index ee54f3dc..8de54718 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -3630,8 +3630,12 @@ boolean P_CameraThinker(player_t *player, camera_t *thiscam, boolean resetcalled
 
 	if (postimg != postimg_none)
 	{
-		if (splitscreen && player == &players[secondarydisplayplayer])
+		if ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
 			postimgtype2 = postimg;
+		else if ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+			postimgtype3 = postimg;
+		else if (splitscreen4 && player == &players[fourthdisplayplayer])
+			postimgtype4 = postimg;
 		else
 			postimgtype = postimg;
 	}
@@ -3678,6 +3682,10 @@ boolean P_CameraThinker(player_t *player, camera_t *thiscam, boolean resetcalled
 
 				if (player == &players[secondarydisplayplayer])
 					cam_height = cv_cam2_height.value;
+				if (player == &players[thirddisplayplayer])
+					cam_height = cv_cam3_height.value;
+				if (player == &players[fourthdisplayplayer])
+					cam_height = cv_cam4_height.value;
 				if (thiscam->z > player->mo->z + player->mo->height + FixedMul(cam_height*FRACUNIT + 16*FRACUNIT, player->mo->scale))
 				{
 					if (!resetcalled)
@@ -6502,8 +6510,14 @@ void P_MobjThinker(mobj_t *mobj)
 
 					if (mobj->target->player->kartstuff[k_bootimer] > 0)
 					{
-						if ((mobj->target->player == &players[displayplayer] || (splitscreen && mobj->target->player == &players[secondarydisplayplayer]))
-							|| (!(mobj->target->player == &players[displayplayer] || (splitscreen && mobj->target->player == &players[secondarydisplayplayer]))
+						if ((mobj->target->player == &players[displayplayer]
+							|| ((splitscreen || splitscreen3 || splitscreen4) && mobj->target->player == &players[secondarydisplayplayer])
+							|| ((splitscreen3 || splitscreen4) && mobj->target->player == &players[thirddisplayplayer])
+							|| (splitscreen4 && mobj->target->player == &players[fourthdisplayplayer]))
+							|| (!(mobj->target->player == &players[displayplayer]
+							|| ((splitscreen || splitscreen3 || splitscreen4) && mobj->target->player == &players[secondarydisplayplayer])
+							|| ((splitscreen3 || splitscreen4) && mobj->target->player == &players[thirddisplayplayer])
+							|| (splitscreen4 && mobj->target->player == &players[fourthdisplayplayer]))
 							&& (mobj->target->player->kartstuff[k_bootimer] < 1*TICRATE/2 || mobj->target->player->kartstuff[k_bootimer] > bootime-(1*TICRATE/2))))
 						{
 							if (leveltime & 1)
diff --git a/src/p_setup.c b/src/p_setup.c
index 3e817fb1..6086a346 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -2365,7 +2365,7 @@ static void P_ForceCharacter(const char *forcecharskin)
 	}
 	else
 	{
-		if (splitscreen)
+		if (splitscreen || splitscreen3 || splitscreen4)
 		{
 			SetPlayerSkin(secondarydisplayplayer, forcecharskin);
 			if ((unsigned)cv_playercolor2.value != skins[players[secondarydisplayplayer].skin].prefcolor && !modeattacking)
@@ -2375,6 +2375,26 @@ static void P_ForceCharacter(const char *forcecharskin)
 			}
 		}
 
+		if (splitscreen3 || splitscreen4)
+		{
+			SetPlayerSkin(thirddisplayplayer, forcecharskin);
+			if ((unsigned)cv_playercolor3.value != skins[players[thirddisplayplayer].skin].prefcolor && !modeattacking)
+			{
+				CV_StealthSetValue(&cv_playercolor3, skins[players[thirddisplayplayer].skin].prefcolor);
+				players[thirddisplayplayer].skincolor = skins[players[thirddisplayplayer].skin].prefcolor;
+			}
+		}
+
+		if (splitscreen4)
+		{
+			SetPlayerSkin(fourthdisplayplayer, forcecharskin);
+			if ((unsigned)cv_playercolor4.value != skins[players[fourthdisplayplayer].skin].prefcolor && !modeattacking)
+			{
+				CV_StealthSetValue(&cv_playercolor4, skins[players[fourthdisplayplayer].skin].prefcolor);
+				players[fourthdisplayplayer].skincolor = skins[players[fourthdisplayplayer].skin].prefcolor;
+			}
+		}
+
 		SetPlayerSkin(consoleplayer, forcecharskin);
 		// normal player colors in single player
 		if ((unsigned)cv_playercolor.value != skins[players[consoleplayer].skin].prefcolor && !modeattacking)
diff --git a/src/p_spec.c b/src/p_spec.c
index 27c17bde..693cf2b7 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -2511,7 +2511,8 @@ static void P_ProcessLineSpecial(line_t *line, mobj_t *mo, sector_t *callsec)
 				if (line->flags & ML_NOCLIMB)
 				{
 					// play the sound from nowhere, but only if display player triggered it
-					if (mo && mo->player && (mo->player == &players[displayplayer] || mo->player == &players[secondarydisplayplayer]))
+					if (mo && mo->player && (mo->player == &players[displayplayer] || mo->player == &players[secondarydisplayplayer]
+						|| mo->player == &players[thirddisplayplayer] || mo->player == &players[fourthdisplayplayer]))
 						S_StartSound(NULL, sfxnum);
 				}
 				else if (line->flags & ML_EFFECT4)
diff --git a/src/p_user.c b/src/p_user.c
index 0ad1c64f..67a89360 100644
--- a/src/p_user.c
+++ b/src/p_user.c
@@ -601,6 +601,10 @@ static void P_DeNightserizePlayer(player_t *player)
 		localaiming = 0;
 	else if (player == &players[secondarydisplayplayer])
 		localaiming2 = 0;
+	else if (player == &players[thirddisplayplayer])
+		localaiming3 = 0;
+	else if (player == &players[fourthdisplayplayer])
+		localaiming4 = 0;
 
 	// If you screwed up, kiss your score goodbye.
 	player->marescore = 0;
@@ -1392,7 +1396,10 @@ fixed_t P_GetPlayerSpinHeight(player_t *player)
 //
 boolean P_IsLocalPlayer(player_t *player)
 {
-	return ((splitscreen && player == &players[secondarydisplayplayer]) || player == &players[consoleplayer]);
+	return ((splitscreen4 && player == &players[fourthdisplayplayer])
+		|| ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+		|| ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
+		|| player == &players[consoleplayer]);
 }
 
 //
@@ -2365,7 +2372,8 @@ static void P_DoPlayerHeadSigns(player_t *player)
 		// If you're "IT", show a big "IT" over your head for others to see.
 		if (player->pflags & PF_TAGIT)
 		{
-			if (!(player == &players[consoleplayer] || player == &players[secondarydisplayplayer] || player == &players[displayplayer])) // Don't display it on your own view.
+			if (!(player == &players[consoleplayer] || player == &players[displayplayer] || player == &players[secondarydisplayplayer]
+				|| player == &players[thirddisplayplayer] || player == &players[fourthdisplayplayer])) // Don't display it on your own view.
 			{
 				if (!(player->mo->eflags & MFE_VERTICALFLIP))
 					P_SpawnMobj(player->mo->x, player->mo->y, player->mo->z + player->mo->height, MT_TAG);
@@ -6300,6 +6308,10 @@ static void P_NiGHTSMovement(player_t *player)
 		localaiming = movingangle;
 	else if (player == &players[secondarydisplayplayer])
 		localaiming2 = movingangle;
+	else if (player == &players[thirddisplayplayer])
+		localaiming3 = movingangle;
+	else if (player == &players[fourthdisplayplayer])
+		localaiming4 = movingangle;
 
 	player->mo->tracer->angle = player->mo->angle;
 
@@ -6791,7 +6803,10 @@ static void P_MovePlayer(player_t *player)
 				S_StartSound(player->mo, sfx_mkdrft);
 			// Ok, we'll stop now.
 			else if ((player->kartstuff[k_drift] == 0)
-			&& (player == &players[consoleplayer] || (splitscreen && player == &players[secondarydisplayplayer])))
+			&& (player == &players[consoleplayer]
+			|| ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
+			|| ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+			|| (splitscreen4 && player == &players[fourthdisplayplayer])))
 				S_StopSoundByID(player->mo, sfx_mkdrft);
 		}
 	}
@@ -8491,21 +8506,11 @@ boolean P_MoveChaseCamera(player_t *player, camera_t *thiscam, boolean resetcall
 	{
 		dist = camdist;
 
-		if (splitscreen) // x1.5 dist for splitscreen
+		if (splitscreen || splitscreen3 || splitscreen4) // x1.5 dist for splitscreen
 		{
 			dist = FixedMul(dist, 3*FRACUNIT/2);
 			height = FixedMul(height, 3*FRACUNIT/2);
 		}
-		else if (splitscreen3) // x1.75 dist for 3p
-		{
-			dist = FixedMul(dist, 7*FRACUNIT/4);
-			height = FixedMul(height, 7*FRACUNIT/4);
-		}
-		else if (splitscreen4) // x2 dist for 4p
-		{
-			dist = FixedMul(dist, 2*FRACUNIT);
-			height = FixedMul(height, 2*FRACUNIT);
-		}
 
 		// x1.2 dist for analog
 		if (P_AnalogMove(player))
@@ -9010,7 +9015,17 @@ static void P_CalcPostImg(player_t *player)
 		pviewheight = player->awayviewmobj->z + 20*FRACUNIT;
 	}
 
-	if (splitscreen && player == &players[secondarydisplayplayer])
+	if (splitscreen4 && player == &players[fourthdisplayplayer])
+	{
+		type = &postimgtype4;
+		param = &postimgparam4;
+	}
+	else if ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+	{
+		type = &postimgtype3;
+		param = &postimgparam3;
+	}
+	else if ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
 	{
 		type = &postimgtype2;
 		param = &postimgparam2;
diff --git a/src/r_main.c b/src/r_main.c
index 66869145..1c9e8744 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -660,11 +660,11 @@ void R_ExecuteSetViewSize(void)
 	if (splitscreen || splitscreen3 || splitscreen4)
 		viewheight >>= 1;
 
+	viewwidth = scaledviewwidth;
+
 	if (splitscreen3 || splitscreen4)
 		viewwidth >>= 1;
 
-	viewwidth = scaledviewwidth;
-
 	centerx = viewwidth/2;
 	centery = viewheight/2;
 	centerxfrac = centerx<<FRACBITS;
@@ -1349,7 +1349,11 @@ void R_RenderPlayerView(player_t *player)
 	}
 
 	// load previous saved value of skyVisible for the player
-	if (splitscreen && player == &players[secondarydisplayplayer])
+	if (splitscreen4 && player == &players[fourthdisplayplayer])
+		skyVisible = skyVisible4;
+	else if ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+		skyVisible = skyVisible3;
+	else if ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
 		skyVisible = skyVisible2;
 	else
 		skyVisible = skyVisible1;
@@ -1455,7 +1459,11 @@ void R_RenderPlayerView(player_t *player)
 
 	// save value to skyVisible1 or skyVisible2
 	// this is so that P1 can't affect whether P2 can see a skybox or not, or vice versa
-	if (splitscreen && player == &players[secondarydisplayplayer])
+	if (splitscreen4 && player == &players[fourthdisplayplayer])
+		skyVisible4 = skyVisible;
+	else if ((splitscreen3 || splitscreen4) && player == &players[thirddisplayplayer])
+		skyVisible3 = skyVisible;
+	else if ((splitscreen || splitscreen3 || splitscreen4) && player == &players[secondarydisplayplayer])
 		skyVisible2 = skyVisible;
 	else
 		skyVisible1 = skyVisible;
diff --git a/src/r_things.c b/src/r_things.c
index d67a66ad..5ecaf399 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -2639,6 +2639,10 @@ void SetPlayerSkinByNum(INT32 playernum, INT32 skinnum)
 				CV_StealthSetValue(&cv_playercolor, skin->prefcolor);
 			else if (playernum == secondarydisplayplayer)
 				CV_StealthSetValue(&cv_playercolor2, skin->prefcolor);
+			else if (playernum == thirddisplayplayer)
+				CV_StealthSetValue(&cv_playercolor3, skin->prefcolor);
+			else if (playernum == fourthdisplayplayer)
+				CV_StealthSetValue(&cv_playercolor4, skin->prefcolor);
 			player->skincolor = skin->prefcolor;
 			if (player->mo)
 				player->mo->color = player->skincolor;
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index 298fa5f0..11da6674 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -2566,6 +2566,20 @@ FUNCMATH void I_Tactile2(FFType pFFType, const JoyFF_t *FFEffect)
 	(void)FFEffect;
 }
 
+FUNCMATH void I_Tactile3(FFType pFFType, const JoyFF_t *FFEffect)
+{
+	// UNUSED.
+	(void)pFFType;
+	(void)FFEffect;
+}
+
+FUNCMATH void I_Tactile4(FFType pFFType, const JoyFF_t *FFEffect)
+{
+	// UNUSED.
+	(void)pFFType;
+	(void)FFEffect;
+}
+
 /**	\brief empty ticcmd for player 1
 */
 static ticcmd_t emptycmd;
diff --git a/src/sdl12/i_system.c b/src/sdl12/i_system.c
index 9058cc4d..86ac6e55 100644
--- a/src/sdl12/i_system.c
+++ b/src/sdl12/i_system.c
@@ -2727,6 +2727,20 @@ void I_Tactile2(FFType pFFType, const JoyFF_t *FFEffect)
 	(void)FFEffect;
 }
 
+void I_Tactile3(FFType pFFType, const JoyFF_t *FFEffect)
+{
+	// UNUSED.
+	(void)pFFType;
+	(void)FFEffect;
+}
+
+void I_Tactile4(FFType pFFType, const JoyFF_t *FFEffect)
+{
+	// UNUSED.
+	(void)pFFType;
+	(void)FFEffect;
+}
+
 /**	\brief empty ticcmd for player 1
 */
 static ticcmd_t emptycmd;
@@ -2745,6 +2759,24 @@ ticcmd_t *I_BaseTiccmd2(void)
 	return &emptycmd2;
 }
 
+/**	\brief empty ticcmd for player 3
+*/
+static ticcmd_t emptycmd3;
+
+ticcmd_t *I_BaseTiccmd3(void)
+{
+	return &emptycmd3;
+}
+
+/**	\brief empty ticcmd for player 4
+*/
+static ticcmd_t emptycmd4;
+
+ticcmd_t *I_BaseTiccmd4(void)
+{
+	return &emptycmd4;
+}
+
 #if (defined (_WIN32) && !defined (_WIN32_WCE)) && !defined (_XBOX)
 static HMODULE winmm = NULL;
 static DWORD starttickcount = 0; // hack for win2k time bug
diff --git a/src/st_stuff.c b/src/st_stuff.c
index 3ea045ca..cd774f30 100644
--- a/src/st_stuff.c
+++ b/src/st_stuff.c
@@ -1993,10 +1993,22 @@ void ST_Drawer(void)
 		stplyr = &players[displayplayer];
 		ST_overlayDrawer();
 
-		if (splitscreen)
+		if (splitscreen || splitscreen3 || splitscreen4)
 		{
 			stplyr = &players[secondarydisplayplayer];
 			ST_overlayDrawer();
 		}
+
+		if (splitscreen3 || splitscreen4)
+		{
+			stplyr = &players[thirddisplayplayer];
+			ST_overlayDrawer();
+		}
+
+		if (splitscreen4)
+		{
+			stplyr = &players[fourthdisplayplayer];
+			ST_overlayDrawer();
+		}
 	}
 }