Puzzle platform game that only real shortcoming is that it's to short :). In it the character you play is stuck in a laboratory and subjected to experiment by a AI named GlaDOS. You are forced to use a portal gun that creates space portals between flat surfaces to solve puzzles by GlaDOS while you are looking for a way to escape the laboratory. The sad part is that when you finally get a hang of the portal gun the game end's so it feels like playing only the tutorial part of a full game :(.

Time for more portal puzzles and now also with tractor beams, light bridges and gels that give surface special properties such as jumping higher. GlaDOS is back and also new characters like the robot Wheatley that help you and Cave Johnson, the deceased CEO of Aperture Science. Great voice work with funny dialogue on all characters in the game.