this game has taken at least 20 years off my life 10/10

Gun makes portals. You use the gun to go through white (portable) walls, and exit each test. Tests get more difficult as you progress throughout the game. You gotta have BIG BRAIN to solve puzzles and then some. Cubes that can crush you. Platforms that stab you. Things that shoot you, burn you and/or your hair, cut you, shoot you even more, fall over you, make you run, make you jump, make walls portable, and emit deadly toxins, but above all else, kill you. 10/10 if you like co-oping with friends and throwing them off platforms. Portal 2, good game!