Half life 2 Deathmatch for ATI Card Owners http://steampowered.com/ati_offer1a/ 
Half life 2 Deathmatch for NVIDIA Card Owners http://steampowered.com/nvidia/ 
Americas Army 3 http://store.steampowered.com/app/13140/ 
Battleforge http://store.steampowered.com/app/24770/ 
Between http://store.steampowered.com/app/29140/ 
Codename Gordon steam://install/92 
COIL http://store.steampowered.com/app/31500/ 
Mightier http://store.steampowered.com/app/29150/ 
Peggle Extreme http://store.steampowered.com/app/3483/ 
Sam & Max Episode 4 http://store.steampowered.com/app/8230/ 
Spacewar steam://install/480
Trackmania Nations Forever http://store.steampowered.com/app/11020/