This Crysis 2 Product Page on EA.com has a link to the game on Origin using a "buy now" button that says "only on Origin." In keeping with that there is a discussion on the Steam Users' Forums about how the first-person shooter sequel is no longer available on Valve's online service. On the other hand, as noted in sflufan's NeoGAF post, as of this writing the game is still for digital distribution on Amazon, Direct2Drive, GamersGate, and Impulse, so we'll have to keep an eye on them. It is also noted that Alice: Madness Returns is likewise not available on Steam, but is on other services, so perhaps there's some sort of Steam/Origins turf war brewing. Thanks nin via Kotaku.