I kinda missed the boat on this one. Nvidia is offering a free digital download of Batman: Arkham Asylum through five online retailers, if you buy one of their select cards.
I thought the catch was that you had to wait until September 15 to claim your free game, but of course, that is the release date for the PC version of this game (which hits consoles on Tuesday) so, nuts to me.
The cards are the GeForce GTX 260, 275 and 285. The retailers are Amazon, NCIX, Newegg, TigerDirect and ZipZoomfly.
But, the disclaimer: "Valid between Sept. 15 and Dec. 31, 2009 or while supplies last" means someone expects they might run out of (virtual) copies. So maybe there is a catch here after all, who knows.
All of the details are at the link.
Free Batman: Arkham Asylum [NVIDIA]