A lot of the ones I was gonna mention have been mentioned already so the one that I didn't see anyone else mention, is Calling All Cars. This game was soooo much fun. I can't believe it had gotten such a bad reception but it's a good game! It never got a chance to get an expansions due to the stupid little controversy with GameSpot!
Also...
1. Snakeball
2. Mushroom Wars
3. Swords & Soldiers
4. Fat Princess