I'll just name a list, i'm not sure if some of these are on the site, but .
Alien Swarm ( Theres 2 kinds of Alien Swarms. )
Fists Of Fu
Kings of Kings 3
Mission Against Terror
League of Legends
GunZ: The Duel
If one of these gets accepted, let me know, i'll download the games because I don't have some of the games listed. I'm also NOT sure if these games are hackable.