diff --git a/extras/conf/D3R-Config.cfg b/extras/conf/D3R-Config.cfg
index 0482dc439..7db8d8d99 100644
--- a/extras/conf/D3R-Config.cfg
+++ b/extras/conf/D3R-Config.cfg
@@ -139,7 +139,7 @@ skins
 // Gametypes
 gametypes
 {
-	-1 = "Single Player";
+	-1 = "Grand Prix";
 	0 = "Race";
 	1 = "Battle";
 }
@@ -5113,6 +5113,7 @@ thingtypes
 			height = 92;
 		}
 	}
+
 	waypoints
 	{
 		color = 4; // Red
@@ -5161,6 +5162,58 @@ thingtypes
 			fixedrotation = 1;
 		}
 	}
+
+	duel
+	{
+		color = 4; // Red
+		arrow = 1;
+		title = "Duel-Only";
+		sprite = "SPBMA2A8";
+		width = 16;
+		height = 32;
+		flags1text = "[1] Spawn in all modes";
+
+		2050
+		{
+			title = "Duel Bomb";
+		}
+
+		2051
+		{
+			title = "Banana";
+			sprite = "BANAA2A8";
+		}
+
+		2052
+		{
+			title = "Eggman Item";
+			sprite = "FITMA0";
+		}
+
+		2053
+		{
+			title = "Proximity Mine";
+			sprite = "SSMNA0";
+		}
+
+		2054
+		{
+			title = "Land Mine";
+			sprite = "LNDMA0";
+		}
+
+		2055
+		{
+			title = "Hyudoro";
+			sprite = "HYUUA2A8";
+		}
+
+		2056
+		{
+			title = "Drop Target";
+			sprite = "DTRGA0";
+		}
+	}
 }
 
 //Default things filters
diff --git a/src/doomstat.h b/src/doomstat.h
index dc6370ece..dc94ed0e6 100644
--- a/src/doomstat.h
+++ b/src/doomstat.h
@@ -669,6 +669,7 @@ extern boolean thwompsactive;
 extern UINT8 lastLowestLap;
 extern SINT8 spbplace;
 extern boolean rainbowstartavailable;
+extern boolean inDuel;
 
 extern tic_t bombflashtimer;	// Used to avoid causing seizures if multiple mines explode close to you :)
 extern boolean legitimateexit;
diff --git a/src/g_game.c b/src/g_game.c
index 181aa0697..3e6d3108d 100644
--- a/src/g_game.c
+++ b/src/g_game.c
@@ -312,6 +312,7 @@ boolean thwompsactive; // Thwomps activate on lap 2
 UINT8 lastLowestLap; // Last lowest lap, for activating race lap executors
 SINT8 spbplace; // SPB exists, give the person behind better items
 boolean rainbowstartavailable; // Boolean, keeps track of if the rainbow start was gotten
+boolean inDuel; // Boolean, keeps track of if it is a 1v1
 
 // Client-sided, unsynched variables (NEVER use in anything that needs to be synced with other players)
 tic_t bombflashtimer = 0;	// Cooldown before another FlashPal can be intialized by a bomb exploding near a displayplayer. Avoids seizures.
diff --git a/src/info.c b/src/info.c
index a5fe03bf2..1d95ad000 100644
--- a/src/info.c
+++ b/src/info.c
@@ -23310,7 +23310,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 	},
 
 	{           // MT_EGGMANITEM
-		-1,             // doomednum
+		2052,           // doomednum
 		S_EGGMANITEM1,  // spawnstate
 		2,              // spawnhealth
 		S_NULL,         // seestate
@@ -23364,7 +23364,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 	},
 
 	{           // MT_BANANA
-		-1,             // doomednum
+		2051,           // doomednum
 		S_BANANA,       // spawnstate
 		2,              // spawnhealth
 		S_NULL,         // seestate
@@ -23553,7 +23553,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 	},
 
 	{           // MT_SSMINE
-		-1,						// doomednum
+		2053,					// doomednum
 		S_SSMINE_AIR1,			// spawnstate
 		1,						// spawnhealth
 		S_NULL,					// seestate
@@ -23688,7 +23688,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 	},
 
 	{           // MT_LANDMINE
-		-1,						// doomednum
+		2054,					// doomednum
 		S_LANDMINE,				// spawnstate
 		2,						// spawnhealth
 		S_NULL,					// seestate
@@ -23715,7 +23715,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 	},
 
 	{           // MT_DROPTARGET
-		-1,             // doomednum
+		2056,           // doomednum
 		S_DROPTARGET,   // spawnstate
 		3,              // spawnhealth
 		S_NULL,         // seestate
@@ -24066,7 +24066,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 	},
 
 	{           // MT_HYUDORO
-		-1,             // doomednum
+		2055,           // doomednum
 		S_HYUDORO,      // spawnstate
 		1000,           // spawnhealth
 		S_NULL,         // seestate
diff --git a/src/k_kart.c b/src/k_kart.c
index 5aa1aaeba..0b391d94d 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -78,6 +78,9 @@ void K_TimerInit(void)
 			numPlayers++;
 		}
 
+		// 1v1 activates DUEL rules!
+		inDuel = (numPlayers == 2);
+
 		if (numPlayers >= 2)
 		{
 			rainbowstartavailable = true;
diff --git a/src/p_mobj.c b/src/p_mobj.c
index 9b08f0e75..4006d399d 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -11548,6 +11548,21 @@ static boolean P_AllowMobjSpawn(mapthing_t* mthing, mobjtype_t i)
 					return false;
 			}
 			break;
+		//case MT_DUELBOMB:
+		case MT_BANANA:
+		case MT_EGGMANITEM:
+		case MT_SSMINE:
+		case MT_LANDMINE:
+		case MT_HYUDORO:
+		case MT_DROPTARGET:
+			{
+				// Duel objects.
+				// Normally only spawn when placed by the map in Duels,
+				// but can be forced to always spawn with the Extra flag.
+				if (inDuel == false && !(mthing->options & MTF_EXTRA))
+					return false;
+			}
+			break;
 		default:
 			break;
 	}
diff --git a/src/p_saveg.c b/src/p_saveg.c
index 233056f21..d050da4b1 100644
--- a/src/p_saveg.c
+++ b/src/p_saveg.c
@@ -4576,6 +4576,7 @@ static void P_NetArchiveMisc(boolean resending)
 	WRITEUINT8(save_p, lastLowestLap);
 	WRITESINT8(save_p, spbplace);
 	WRITEUINT8(save_p, rainbowstartavailable);
+	WRITEUINT8(save_p, inDuel);
 
 	WRITEUINT32(save_p, introtime);
 	WRITEUINT32(save_p, starttime);
@@ -4733,6 +4734,7 @@ static inline boolean P_NetUnArchiveMisc(boolean reloading)
 	lastLowestLap = READUINT8(save_p);
 	spbplace = READSINT8(save_p);
 	rainbowstartavailable = (boolean)READUINT8(save_p);
+	inDuel = (boolean)READUINT8(save_p);
 
 	introtime = READUINT32(save_p);
 	starttime = READUINT32(save_p);