A very clever layout of concentric & not so concentric areas wherein you must make your way on assorted pathways and various levels in order to 'steal' a Time Machine. Has possibilities. Best you conserve ammo!
Huge. Lots of square rooms, with floating stones i the center, and sewage pits filled with drones, linked by sewage passageways. Some cool effects, but no plot to speak of (well, stay alive long enough to see the whole thing...).