From The TimeSplitters Wiki

Compound
Size	Small
Location	A sort of outdoors warehouse.
Climate	TS1: Night TS2:Rain
Unlockable	TS1: "Docks" on Normal TS2: Story Mode on Normal
Recommended Bots	?
Recommended Weapons	?

Compound first appeared in TS1 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.