Magicka? Multiplayer, single-player, co-op and cards :)
for Portal 2
interest you an unreal deal pack gift?
Surgeon Simulator 2013,Sonic Adventure 2 and The Haunted: Hells Reach and 2 summer cards for 4 keys.
Anything interest you from here? http://www.steamtrades.com/trade/jIUKD/hwarlockmasterofthearcanerealwarfaremorew1-tf2-key-for-4-games
Bastion - 2 keys, Starvoid - 2 keys, Faerie Solitaire - 1 key?
Portal 2 - 3 keys
Just Cause 2 - 2 keys
Terraria - 2 keys
Tomb Raider Underworld - 2 keys