Looks like the rumor mill was spot on. The announcement hasn't hit Nvidia's newsroom yet, but the company e-mailed us the news yesterday evening: GeForce graphics cards from the GTX 660 on up are now bundled with a free copy of Metro: Last light, the sequel to Metro 2033.
A list of participating e-tailers and system builders can be viewed here on GeForce.com. The same page includes a link to the voucher redemption form, as well. New buyers needn't hurry, though, since Metro: Last Light isn't actually coming out until May 14. According to the Terms & Conditions page on Amazon, the promotion applies to all purchases made from April 16 through June 15.
The cheapest card covered under the deal appears to be this one, an EVGA GeForce GTX 660 Superclocked priced at $199.99 (or $189.99 after a $10 mail-in rebate). Considering the game currently costs $49.99 by itself to pre-order on Steam, that's not a bad deal at all. Of course, it's still not quite on par with AMD's latest Never Settle Reloaded offer, which includes BioShock Infinite, Tomb Raider, and Far Cry 3 Blood Dragon with all Radeon HD 7800 series graphics cards.