My first experience with Portal in general and man it's so much fun. The puzzles are longer and are far more fun than they were in 1 (I especially loved the gimmicks you were given to spice things up like the goop that can change an attribute of your movement or another object's movement), the story is charming and very funny, the co op was incredible. I still have fun trying to get through certain puzzles as fast as possible to this day.