1. Halo Combat Evolved
2. Halo 3
3. Half life 2
4. Super Mario Bros. 3
5. Crackdown
I like a lot of oldschool NES, Genesis, and SNES games. SMB3 Had to go there cause I practically grew up with that game. Has a lot of meaning to me.
I also hate how underrated Crackdown was. I wasn't really original combining the greatest things of different games into one. Such as; energy shields (Halo much?), the ability to steal vehicles and kill any NPC (Grand Theft Auto), and super strength and other abilities. That last one reminds me a lot of your generic super hero game.
It was a great game though, I don't see why not many people likes it.