diff --git a/OpenRa.Game/Effects/Bullet.cs b/OpenRa.Game/Effects/Bullet.cs
index 2998e5d037..bb78a6d95d 100755
--- a/OpenRa.Game/Effects/Bullet.cs
+++ b/OpenRa.Game/Effects/Bullet.cs
@@ -38,8 +38,8 @@ namespace OpenRa.Effects
 			SrcAltitude = srcAltitude;
 			DestAltitude = destAltitude;
 			VisualDest = Dest + new int2(
-						Game.CosmeticRandom.Next(-10, 10),
-						Game.CosmeticRandom.Next(-10, 10));
+						firedBy.World.CosmeticRandom.Next(-10, 10),
+						firedBy.World.CosmeticRandom.Next(-10, 10));
 			Weapon = weapon;
 			Projectile = Rules.ProjectileInfo[Weapon.Projectile];
 			Warhead = Rules.WarheadInfo[Weapon.Warhead];
diff --git a/OpenRa.Game/Game.cs b/OpenRa.Game/Game.cs
index 506563d6d8..a4fcbd4736 100644
--- a/OpenRa.Game/Game.cs
+++ b/OpenRa.Game/Game.cs
@@ -177,9 +177,6 @@ namespace OpenRa
 			PerfHistory.items["batches"].Tick();
 		}
 
-		public static Random SharedRandom = new Random(0);		/* for things that require sync */
-		public static Random CosmeticRandom = new Random();		/* for things that are just fluff */
-
 		public static void SyncLobbyInfo(string data)
 		{
 			var session = new Session();
@@ -256,7 +253,7 @@ namespace OpenRa
 				throw new InvalidOperationException("No free spawnpoint.");
 
 			var n = taken.Count == 0 
-				? Game.SharedRandom.Next(available.Count)
+				? world.SharedRandom.Next(available.Count)
 				: available			// pick the most distant spawnpoint from everyone else
 					.Select((k,i) => Pair.New(k,i))
 					.OrderByDescending(a => taken.Sum(t => (t - a.First).LengthSquared))
diff --git a/OpenRa.Game/GameRules/VoiceInfo.cs b/OpenRa.Game/GameRules/VoiceInfo.cs
index 4526dd09db..34d45d559c 100644
--- a/OpenRa.Game/GameRules/VoiceInfo.cs
+++ b/OpenRa.Game/GameRules/VoiceInfo.cs
@@ -45,7 +45,7 @@ namespace OpenRa.GameRules
 			if (liveclips.Count == 0)
 				return null;		/* avoid crashing if there's no clips at all */
 
-			var i = Game.CosmeticRandom.Next(liveclips.Count);
+			var i = Game.world.CosmeticRandom.Next(liveclips.Count);
 			var s = liveclips[i];
 			liveclips.RemoveAt(i);
 			return s;
diff --git a/OpenRa.Game/Traits/Crate.cs b/OpenRa.Game/Traits/Crate.cs
index e1ae0505d3..4676d7b944 100644
--- a/OpenRa.Game/Traits/Crate.cs
+++ b/OpenRa.Game/Traits/Crate.cs
@@ -46,7 +46,7 @@ namespace OpenRa.Traits
 		{
 			var shares = self.traits.WithInterface<ICrateAction>().Select(a => Pair.New(a, a.SelectionShares));
 			var totalShares = shares.Sum(a => a.Second);
-			var n = Game.SharedRandom.Next(totalShares);
+			var n = self.World.SharedRandom.Next(totalShares);
 
 			self.World.AddFrameEndTask(w => w.Remove(self));
 			foreach (var s in shares)
diff --git a/OpenRa.Game/Traits/SeedsOre.cs b/OpenRa.Game/Traits/SeedsOre.cs
index 139b5c8881..21e1ec07d0 100644
--- a/OpenRa.Game/Traits/SeedsOre.cs
+++ b/OpenRa.Game/Traits/SeedsOre.cs
@@ -21,7 +21,7 @@ namespace OpenRa.Traits
 
 				for (var j = -1; j < 2; j++)
 					for (var i = -1; i < 2; i++)
-						if (Game.SharedRandom.NextDouble() < info.Chance)
+						if (self.World.SharedRandom.NextDouble() < info.Chance)
 							if (self.World.OreCanSpreadInto(self.Location.X + i, self.Location.Y + j))
 								self.World.Map.AddOre(self.Location.X + i, self.Location.Y + j);
 
diff --git a/OpenRa.Game/Traits/World/CrateSpawner.cs b/OpenRa.Game/Traits/World/CrateSpawner.cs
index 88a82c06ea..ef814aaab9 100644
--- a/OpenRa.Game/Traits/World/CrateSpawner.cs
+++ b/OpenRa.Game/Traits/World/CrateSpawner.cs
@@ -41,12 +41,12 @@ namespace OpenRa.Traits
 
 		void SpawnCrate(Actor self, CrateSpawnerInfo info)
 		{
-			var inWater = Game.SharedRandom.NextDouble() < info.WaterChance;
+			var inWater = self.World.SharedRandom.NextDouble() < info.WaterChance;
 			var umt = inWater ? UnitMovementType.Float : UnitMovementType.Wheel;
 
 			for (; ; )
 			{
-				var p = new int2(Game.SharedRandom.Next(0,127), Game.SharedRandom.Next(0,127));
+				var p = new int2(self.World.SharedRandom.Next(0, 127), self.World.SharedRandom.Next(0, 127));
 				if (self.World.IsCellBuildable(p, umt))
 				{
 					self.World.AddFrameEndTask(
diff --git a/OpenRa.Game/Traits/World/OreGrowth.cs b/OpenRa.Game/Traits/World/OreGrowth.cs
index f79b21decc..0cd01b52c5 100644
--- a/OpenRa.Game/Traits/World/OreGrowth.cs
+++ b/OpenRa.Game/Traits/World/OreGrowth.cs
@@ -28,11 +28,11 @@ namespace OpenRa.Traits
 				
 				if (info.Spreads) 
 					Ore.SpreadOre(self.World, 
-						Game.SharedRandom,
+						self.World.SharedRandom,
 						info.Chance);
 
 				if (info.Grows)
-					Ore.GrowOre(self.World, Game.SharedRandom);
+					Ore.GrowOre(self.World, self.World.SharedRandom);
 
 				self.World.Minimap.InvalidateOre();
 				remainingTicks = (int)(info.Interval * 60 * 25);
diff --git a/OpenRa.Game/World.cs b/OpenRa.Game/World.cs
index 9762d32dbf..8b2b65939a 100644
--- a/OpenRa.Game/World.cs
+++ b/OpenRa.Game/World.cs
@@ -16,6 +16,9 @@ namespace OpenRa
 		List<IEffect> effects = new List<IEffect>();
 		List<Action<World>> frameEndActions = new List<Action<World>>();
 
+		public Random SharedRandom = new Random(0);	// synced
+		public Random CosmeticRandom = new Random();	// not synced
+
 		public readonly Dictionary<int, Player> players = new Dictionary<int, Player>();
 
 		int localPlayerIndex;
diff --git a/OpenRa.Game/WorldUtils.cs b/OpenRa.Game/WorldUtils.cs
index 6709a59fe0..57ae789d51 100755
--- a/OpenRa.Game/WorldUtils.cs
+++ b/OpenRa.Game/WorldUtils.cs
@@ -177,13 +177,13 @@ namespace OpenRa
 
 		public static int2 ChooseRandomEdgeCell(this World w)
 		{
-			var isX = Game.SharedRandom.Next(2) == 0;
-			var edge = Game.SharedRandom.Next(2) == 0;
+			var isX = w.SharedRandom.Next(2) == 0;
+			var edge = w.SharedRandom.Next(2) == 0;
 
 			return new int2(
-				isX ? Game.SharedRandom.Next(w.Map.XOffset, w.Map.XOffset + w.Map.Width)
+				isX ? w.SharedRandom.Next(w.Map.XOffset, w.Map.XOffset + w.Map.Width)
 					: (edge ? w.Map.XOffset : w.Map.XOffset + w.Map.Width),
-				!isX ? Game.SharedRandom.Next(w.Map.YOffset, w.Map.YOffset + w.Map.Height)
+				!isX ? w.SharedRandom.Next(w.Map.YOffset, w.Map.YOffset + w.Map.Height)
 					: (edge ? w.Map.YOffset : w.Map.YOffset + w.Map.Height));
 		}