Steam summer sale, July 6: Left 4 Dead 2, GTA IV and DLC, Prototype, Arkham Asylum

You would have to be absolutely insane to miss out on the deals Steam's put up for its summer sale tonight. Left 4 Dead 2's gone up for £3.74, Far Cry 2 for £2.49, Prototype for £7.49 and Batman: Arkham Asylum GOTY for £3.74. Big deal, though, has to be Grand Theft Auto IV and its two episodes - The Lost and Damned and The Ballad of Gay Tony - for £6.24. There's more deals here.