King's Bounty 75% off daily deal on Steam. You can get The Legend for $3.74, Armored Princess for $6.24 or get a pack with both plus the Crossworlds expansion for $8.74.
I actually already own those games but might get them again to have them on Steam.
*Edit: They've also got the whole Quakecon thing going on. There's a pack with all the ID and Bethesda games for for $70, but if you pre-order Skyrim you get the pack at 30% off for $55. Also order Rage and the pack drops to $40.
Pre-ording Skyrim will get you a Nord helm for Team Fortress 2 as well.
The pack has Morrowind and all expansions, Oblivion, all expansions and DLC, Fallout 3 all DLC, New Vegas and all DLC (including Old World Blues), plus Quake, Doom, Wolfenstein, Brink, Call of Cthulhu etc.
*Edit2: It looks like they will also be doing different deals every day. Today is the Quake/Doom pack so we might see a Bethesda pack without all the ID stuff at a lower price point than the big pack. Possibly FNV: Old World Blues might go down cheaper too.