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The GameFly / GameFly UK Not So Scary End of the World Sale has been updated with a new set of deals. They will last for 48 hours only. Some good deals here. I don’t believe there are any active coupons at this time.
Amnesia: The Dark Descent = $4.99 
Call of Duty 4: Modern Warfare = $9.99
Civilization IV = $4.99
Far Cry = $2.49
Half-Life 2 = $2.49 (Steam)
BioShock = $4.99
Deus Ex: Human Revolution = $4.99 (Steam)
Sleeping Dogs Digital Edition = $16.99 (Steam)
Anno 2070 = $19.99
Defense Grid: UltraBundle = $5.43 (Steam)
Company of Heroes Gold = $7.49
Rome: Total War = $2.49
Mac Games
Company of Heroes Complete – Campaign Edition = $7.49
Deus Ex Human Revolution – Ultimate Edition = $19.99
Call of Duty 4 – Modern Warfare = $7.49