Apparently a "Sequels Extravaganza" sale. Includes:
Fallout 3 - 50% off all 4 DLC add-ons
Fable II - 50(ish)% off Knothole Island and See the Future
Star Wars: TFU - 50% off Hoth, Tatooine and Jedi Temple
Assassin's Creed 2 - 50(ish)% off Bonfire+Secret Levels, regular Bonfire of the Vanities and Battle of Forli
There appears to be other odds and ends on sale, like Avatar Items.
Fallout 3 - 50% off all 4 DLC add-ons
Fable II - 50(ish)% off Knothole Island and See the Future
Star Wars: TFU - 50% off Hoth, Tatooine and Jedi Temple
Assassin's Creed 2 - 50(ish)% off Bonfire+Secret Levels, regular Bonfire of the Vanities and Battle of Forli
There appears to be other odds and ends on sale, like Avatar Items.