Usually you can play five-hundred lives in Vampire in TimeSplitters Future Perfect, but can't in a normal Elimination game. However, it is possible to. If you select Vampire mode and change the lives to 500, and then go back and go to Elimination, it will appear as 500 lives. Moving it off 500, will however not make it returnable unless you repeat the stages. The only thing bad about this glitch is it means you have to endure a 500 life Elimination, and it takes a long time.