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Tripwire Bundle = 5 Keys
Counter Strike Complete = 5 Keys
Sniper: Ghost Warrior 2 = 4 Keys
Left 4 Dead Bundle = 4 Keys
Killing Floor Bundle 2013 = 4 Keys
Half Life Complete = 4 Keys
Binary Domain + DLC = 3 Keys
The four keys for rising storm? I have a spare copy and might trade it.
Raised the offer of keys to 5