37. Duke Nukem 3D
I played this when I was in my teens, which was essentially the perfect time to play something as immature as this. But it was brilliantly immature, rather than gratingly so, although I haven't played it recently to avoid potentially changing my mind about this. It had crazy weapons (the shrink ray was a personal favourite), and numerous memorable one liners along with a crazy story about aliens capturing women. Basically, it was just mindless immature fun at a time when I loved that kind of thing.