having trouble with one of the acheivements, anyone know how to knock the camreas off the walls that you can't put portals on? i tried falling on it, break it with a cube, no luck...any help will do, thanks.
also great game, kinda gave me a headache, not because the puzzles but motion sickness falling through the portals i guess, beat it twice already, 1st time about 3 hours, second time 1 1/2 hrs, havent tried advanced yet but will before i have to return the game.