Once it's complete, work will begin on a spinoff titled "Dungeon: Deathmatch".
As the name implies, Deathmatch will be a FPS that takes place in Dungeon, and will only be playable through Steam.
Servers for Dungeon: Deathmatch will be VAC secured, and therefore cheating in Dungeon: Deathmatch or any other Source Multiplayer game will ban you in every Source Multiplayer game.