Blink over to GamersGate and you'll find a selection of Bethesda published and developed games, their prices magicked in half (opens in new tab) for this weekend by Baargan'an, Daedric lord of cheap stuff. From there you can... er... damn. I was going to crudely shoehorn in a Rage reference, but I can remember almost nothing about that game. Oh, it had John Goodman in it. Maybe there's something there?
Highlights include Dishonored and Skyrim at £7.49 each, and Fallout: New Vegas Ultimate Edition (the one with the added DLC bits) for £7.48.
Strangely, even the earlier non-Steamworks parts of their discounted catalogue, like Morrowind and Oblivion, require a Steam account to activate. It's unlikely to be a big deal for most, but it's worth bearing in mind if you don't want Rogue Warrior to Sulley your account.
"Sulley," get it? Because that was John Goodman's character in Monsters, Inc? Honestly, I don't know why I bother.
Head here (opens in new tab) for the full sale list.
Thanks, Joystiq .