It seems Crysis 2, developed by Crytek and published by EA, is going to be a digital exclusive to Origin as the shooter is suddenly delisted from Steam.
In fact the "buy now - only on Origin". Currently other digital stores like Impulse and Direct2Drive still offer the title but that may change soon enough. Otherwise EA is specifically targeting Steam - the biggest player.for Crysis 2 says
EA already mentioned that Origin would be getting exclusive content with future EA titles. Other releases from the publishing giant remain on Steam like Dragon Age 2, Bulletstorm, Need for Speed: Shift 2 Unleashed and the more recent Alice: Madness Returns.
Time will tell if EA plan on expanding this digital exclusivity.