diff --git a/mods/cnc/mod.yaml b/mods/cnc/mod.yaml
index a98541388a..263b23f8e0 100644
--- a/mods/cnc/mod.yaml
+++ b/mods/cnc/mod.yaml
@@ -209,6 +209,10 @@ SpriteSequenceFormat: TilesetSpecificSpriteSequence
 ModelSequenceFormat: PlaceholderModelSequence
 
 GameSpeeds:
+	slowest:
+		Name: Slowest
+		Timestep: 80
+		OrderLatency: 2
 	slower:
 		Name: Slower
 		Timestep: 50
diff --git a/mods/d2k/mod.yaml b/mods/d2k/mod.yaml
index fb8f9faa83..4da711add3 100644
--- a/mods/d2k/mod.yaml
+++ b/mods/d2k/mod.yaml
@@ -186,6 +186,10 @@ SpriteSequenceFormat: DefaultSpriteSequence
 ModelSequenceFormat: PlaceholderModelSequence
 
 GameSpeeds:
+	slowest:
+		Name: Slowest
+		Timestep: 80
+		OrderLatency: 2
 	slower:
 		Name: Slower
 		Timestep: 50
diff --git a/mods/ra/mod.yaml b/mods/ra/mod.yaml
index 0f5db0112a..69f65e2284 100644
--- a/mods/ra/mod.yaml
+++ b/mods/ra/mod.yaml
@@ -211,6 +211,10 @@ SpriteSequenceFormat: TilesetSpecificSpriteSequence
 ModelSequenceFormat: PlaceholderModelSequence
 
 GameSpeeds:
+	slowest:
+		Name: Slowest
+		Timestep: 80
+		OrderLatency: 2
 	slower:
 		Name: Slower
 		Timestep: 50
diff --git a/mods/ts/mod.yaml b/mods/ts/mod.yaml
index 38ed1405b4..d5479468f7 100644
--- a/mods/ts/mod.yaml
+++ b/mods/ts/mod.yaml
@@ -247,6 +247,10 @@ SpriteSequenceFormat: TilesetSpecificSpriteSequence
 ModelSequenceFormat: VoxelModelSequence
 
 GameSpeeds:
+	slowest:
+		Name: Slowest
+		Timestep: 80
+		OrderLatency: 2
 	slower:
 		Name: Slower
 		Timestep: 50