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"Players who bought retail PC copies of Black Ops 2 &amp;ndash; some of the same people who waited in line for hours on a cold November night during the midnight launch &amp;ndash; popped in the second installation disc to find that it's for Mass Effect 2. Reports on Steam, Reddit, 4chan and the Black Ops 2 forums describe the same problem, and the video below shows it in action (along with some NSFW language).This prevents these players from installing Black Ops 2 with the discs, but each retail copy comes with a Steam key and the entire game can be installed digitally. It will take a while, but it is at least, eventually, playable; this process largely negates the entire \"waiting in line for a retail version\" thing, though.We've contacted Activision for more information."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2012/11/13/report-some-black-ops-2-retail-discs-contain-mass-effect-2-info/>