Binary Domain is a third-person shooter, developed by Yakuza Team for Sega, set in a future populated by robots, humans and even robots that look like humans. The heart of Binary Domain is its Consequence system, which takes player actions into account and modifies squad AI behavior based on how they view your choices.
Oddworld: Stranger's Wrath, the action-adventure where you hunt down bounties as the gruff-but-lovable Stranger, was developed by Oddworld Inhabitants and originally launched on the Xbox back in 2005. It is categorized by a unique system where players use in-game creatures as ammo. We've heard of pea shooters, but this one's got bee shooters.
In addition to the free downloads, Worms 2: Armageddon will be on sale tomorrow when the weekly content update drops. It's regularly $15 but will be discounted down to $4.50.