MDK gets almost everything right. It's an excellent example of how a 3rd person shooter should play. The game has a fun and interesting premise (janitor in a super suit saves the world), there's a lot of variation in puzzles and lots of huge enemies to blast. Add in things like tube surfing, free falling and sniper gameplay and you have a great, if somewhat short game. If you've never played MDK, it's definitely worth it for $5.99.