ya that achievement is easy
heres a couple tips
:dont pick up anything but totems
:pause the game when you get on an elevador to save time
:if your about to run out of time or die, just pause the game and return to the main menu so you can basically restart the stage
(this is the easiest 35 points on xbl if you can control the totemball)
100%console Prey,Kameo,Splinter Cell,Viva Pinata,Oblivion,Battlefield2,Saints Row,Tetris,FEAR,Crackdown,Forza2,BioShock