From The TimeSplitters Wiki

Lip Up Fatty
IMAGE NEEDED
Game	TS: FP
Section	Mode Madness
Map	Mars Prison
Character	Mordecai Jones
Enemies Encountered	INSETICK SD/10 GOLIATH SD/9 PROMETHEUS SK/8 PROMETHEUS SD/7 Prison Officer
Rewards	Dozer
Medal Requirements	?

Lip Up Fatty is an Assault match that puts the human/cyborg characters from the Machine Wars story stages in the Mars Prison stage where the objective is to break into the prison and assasinate the prisoner Dozer.