From The TimeSplitters Wiki

Compound
Size	Small
Location	A sort of outdoors warehouse.
Climate	TS1: Night TS2: Rainy night
Unlockable	TS1: Docks on Normal TS2: Story Mode on Normal
Recommended Bots	Krayola Ghost Sadako Chastity Barby Gimp Riot Officer Milkbaby The Master Jo-Beth Casey Kitten Celeste
Recommended Weapons	Scifi Handgun SBP90 Machinegun Shotgun Lasergun Plasma Autorifle

Compound first appeared in TimeSplitters and reappeared in TimeSplitters 2, with a visual upgrade and an added rain effect. It features a building for sniping, and a medium sized compound with stacked boxes for hiding behind. It also has a helicopter flying round the map on TimeSplitters 1.