The first time I played this game I ended bumping my head over my desk. It really challenges the player to think for been able to solve the puzzles. The story of the game is simple but powerful, a rampart AI toying with the player, chamber after chamber, mocking you and wanting to kill you. And is not easy task survive the most difficult maps without dying at least once. Despite been a puzzle game I found hours of fun and even joy when I mastered the game, to the point that I don’t lose time, I have an economy of portals, and economy of steps and some of the most crazy air acrobatics I ever made in a video game. You need to remember two thing in this game, the first is: Speedy thing in, speedy thing out. The second one is: the cake is a lie? Play it for find it out. I almost forgot, this game have the best voice acting I ever heard, Ellen McLain did an awesome work for this game.