Chanceboxes and collectibles shouldn't appear in DM.

language.version

@@ -1,3 +1,3 @@
 [default]
-SWWM_MODVER="\chSWWM \czGZ\c- \cw0.9.11b-pre r505 \cu(Sun 23 May 14:05:28 CEST 2021)\c-";
-SWWM_SHORTVER="\cw0.9.11b-pre r505 \cu(2021-05-23 14:05:28)\c-";
+SWWM_MODVER="\chSWWM \czGZ\c- \cw0.9.11b-pre r506 \cu(Sun 23 May 19:12:56 CEST 2021)\c-";
+SWWM_SHORTVER="\cw0.9.11b-pre r506 \cu(2021-05-23 19:12:56)\c-";

zscript/handler/swwm_handler_worldload.zsc

@@ -271,7 +271,7 @@ extend Class SWWMHandler
 			SWWMInterest.Spawn(lpos,theline:l);
 		}
 		// spawn loot
-		Chancebox.SpawnChanceboxes();
+		if ( !deathmatch ) Chancebox.SpawnChanceboxes();
 		// list map keys
 		let ti = ThinkerIterator.Create("Key");
 		Key k;

zscript/items/swwm_collectibles.zsc

@@ -46,17 +46,11 @@ Class SWWMCollectible : Inventory abstract
 		if ( (avail == AVAIL_Hexen) && (gameinfo.gametype&GAME_Hexen) ) return true;
 		return false;
 	}
-	override void PostBeginPlay()
+	override bool ShouldSpawn()
 	{
-		Super.PostBeginPlay();
-		// delet ourselves if wrong iwad
-		if ( !ValidGame() ) Destroy();
-	}
-	override bool CanPickup( Actor toucher )
-	{
-		// no pickup if wrong iwad
-		if ( !ValidGame() ) return false;
-		return Super.CanPickup(toucher);
+		// don't spawn in-game if on deathmatch or the wrong IWAD
+		if ( deathmatch || !ValidGame() ) return false;
+		return true;
 	}
 	override string PickupMessage()
 	{

zscript/items/swwm_funstuff.zsc

@@ -716,6 +716,12 @@ Class ChanceboxSpawner : Actor
 {
 	override void PostBeginPlay()
 	{
+		if ( deathmatch )
+		{
+			// not in DM
+			Destroy();
+			return;
+		}
 		int numbox = 0;
 		let ti = ThinkerIterator.Create("ChanceboxSpawner");
 		while ( ti.Next() ) numbox++;