Open to trade with anyone and everyone:
https://steamcommunity.com/tradeoffer/new/?partner=34752783&token=-AdHSXUq

Half-Life
Half-Life 2
Half-Life 2: Episode One
Half-Life 2: Episode Two
Portal
Portal: Still Alive
Portal 2
Team Fortress
Team Fortress 2
Left 4 Dead
Left 4 Dead 2
GoldenEye Source: Beta 4
Black Mesa Source (Half Life Source)
Operation Black Mesa (Opposing Forces Source)
Guard Duty (Blue Shift Source)
Insurgency
Battlefield 2
S.T.A.L.K.E.R: Shadow of Chernobyl
S.T.A.L.K.E.R: Clear Sky
S.T.A.L.K.E.R: Call of Pripyat
F.E.A.R.
F.E.A.R. 2: Projet Origin
F.E.A.R. 3
Braid
Machinarium
Warhammer 40,000: Dawn of War
Warhammer 40,000: Dawn of War II
Warhammer 40,000: Dawn of War II - Chaos Rising
Warhammer 40,000: Dawn of War II - Retribution

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