Halo: Combat Evolved. It is a covenant cooling facility with several rooms and hallways. Being one of the smallest multiplayer maps in the game, Chill Out is well suited for small, usually team-based, games between two to eight players. This map has only three teleporters, but the ledges in the map expand to reach every single corner of the map.
Chill Out has a floor of steaming nitrogen and was designed for Covenant use. It is an extremely varied and asymmetrical map. It is a very closed in map, allowing for great combat with minimal people.