From The TimeSplitters Wiki

Mars Prison
Size	Large
Location	On Mars
Climate	None
Unlockable	Unlocked by Default
Recommended Bots	Lazarus Mumble Angel Forge Ghengis Kant Lt. Black Prison Officer Mordecai Jones Comrade Papadov INSETICK SD/12 Ivor Baddic Time Assassin
Recommended Weapons	Sci-Fi Handgun Plasma Autorifle Sci-Fi Sniper Rocket Launcher Plasma Grenades Timed Mines

Mars Prison is set on Mars. It is one of the larger maps in TimeSplitters Future Perfect. It has several wide open courtyards navigated by a series of ramps and walkways. The map also has several buildings, like the storage/bunker area.

This level is playable on Assault.

In Assault and Capture the Bag, the level is expanded to include the areas outside of the prison. The back entrance to the prison is sealed off during assault, for obvious reasons. The cell area is also accessible because it serves as a bag base, and the location of the final objective (Kill the prisoner) in Assault.