Renegade Ops / Nuclear Dawn / King Arthur - The Role-playing Wargame / HAWX / Killing Floor / S.T.A.L.K.E.R.: Call of Pripyat ?
i give you half life 2, 3 coals and 50%valve
If you like the deal add me:
FlatOut, Serious Sam HD: The Second Encounter or Hunted: The Demon’s Forge?
I'll take you up on that offer http://steamcommunity.com/id/waynech7777777
Hoard and Day of Defeat: Source for L4D2
Both games will get an achievement according to this site: http://steamcheeves.com/