This game has eaten up so many hours of my life. Probably the game I've replayed most, and for good reason. It's movement is so good and even after hundreds of hours I'm still barely considered "good" at the game. Once you've played the game alot you can beat the campaign in as little as an hour (not counting the final level lol). Also the game has stunning visuals and music that makes replaying it all the more enjoyable.