This game has been considered a relative of Portal. Yes, in a way it is, but it has something new, the plot. You're Dax, a trainee , and you find yourself in a situation that requires your skills as a puzzle-solver in order to escape that facility.
You train to become magrunner, an elite soldier. But things go wrong and a conspiracy of cultists throws you in the hell of Cthulhu and the old ones. You have to fight using only your brilliance and skills. You have no weapon, except magnetism. Use you abilities and later, you magnet-puppy to pass over any obstacle.
There were moments there when you kind of need help (I needed, I tell you) because there were some really weird puzzles there.
The graphics is superb and the music enjoyable.