Originally released for the Xbox in 2005, Stubbs the Zombie in Rebel Without a Pulse made news because it was a creative action game from the same minds that originally worked on Halo. In case you missed it back then, GameAgent is currently running a promotion on the downloadable PC version of the game – they're giving it away completely FREE of charge.
Update
It seems like yesterday's promo was too popular. WorthPlaying is reporting that GameAgent raised the price to $5 today.
"UPDATE: It seems the freebie might have been too popular as GameAgent has raised the price to $5."