The main week of the mod takes place within the Ka-Pow! universe.
Think about it. Flippy acts a LOT more bloodthirsty than he is in Happy Tree Friends proper, and the devs have shown characters who were exclusive to "Operation Tiger Bomb" (e.g., the Tiger General and his soldiers) who will appear in the full mod.
- Confirmed with the existence of a song that takes place within the Ka-Pow universe, Jossed with the existence of characters like Flaky, Lumpy and Cuddles.
