Originally Posted by Misfire
this is correct, the steam version runs perfectly fine, all it did was use securom to check the release date and that was it. and the DRM is not like SPORE or bioshock, you can install it as many times as you want, and crytek will soon release an official statement about its DRM
All posts and screenshots on the steam forums point to it using the same activation as retail.
To be honest this has really depressed me re the state of PC gaming. Possibly the only decent PC shooter of the year, and definitely the only good PC exclusive shooter of 2008 and I wont be playing it because its developer is actively doing everything they can to put consumers off it.