NowGamer - It’s Portal! Except it’s not. Quantum Conundrum is an XBLA and PSN-bound puzzle game where, excuse the boring technical moonspeak, you can switch between four different dimensions to alter the world around you. You can make objects fluffy which makes them lighter, hard which makes them heavier, slow down time or reverse gravity.
An example. You’re in a room with furniture you can’t lift, a pressure switch and a door that won’t open. What do you do? You have to turn the world fluffy, grab the now lighter furniture, place it on a pressure switch and turn the world heavy.