From The TimeSplitters Wiki

Template:Sergio's Last Stand
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Game	TS2
Section	[[]]
Map	Big Top In Circus
Character	Sergio
Enemies Encountered	N/A
Rewards	Sergio
Medal Requirements

Sergio's Last Stand is a Challenge Mode level in TimeSplitters 2 that involves Sergio facing off against a never-ending horde of zombies. The goal is to get as many points as you can by shooting off heads and arms without dying.

Strategy

This challenge can be quite difficult. All you get is the Tactical 12-Gauge. The best strategy here is to circle around the room without going out of bounds and use the secondary firing (that shoots two shots) of the shotgun on the zombies that will attack you as that will usually kill them in one shot. After a few rounds, some zombies on fire will start to spawn so make sure not to touch them. Just continue circling the room without letting any zombies get behind you or corner you. If you do catch fire, you can use the Fire Extinguisher behind the poles to put yourself out. If you run out of ammo, Shotgun ammo responds every round in the middle. And just try not to get hurt during the rounds (especially in the earlier rounds as they are the easiest) as you get extra points.