As of today you can no longer by Crysis 2 from Steam.
http://www.ea.com/crysis-2/pc-download
But for some reason it's still available on a lot of other DD services. If I had to guess why it's that the contracts weren't signed at the same time so the terms will expire on different days.
This bodes ill for future EA PC releases being on anything other than Origin for the foreseeable future, in order of how much you should care:
Battlefield 3
Mass Effect 3
uh..
hmm
err
Dragon Age 2 DLC? :D
eh...
KOTORO
Update:
XI Wiki



