A growing number of players are reporting that they found Mass Effect 2 game disc in place of the second disc in their Call of Duty: Black Ops II packages.
Mass Effect 2 is published by Electronic Arts while Black Ops II is published by Activision. A likely explanation for the mix up is that both companies might’ve subcontracted the same disc manufacturing plant.
Activision hasn’t addressed the issue yet, but in the meanwhile player who find the wrong discs in their Black Ops II packages are able to use the serial code found inside the box to download a digital copy of the game.
So far, only boxes of the PC version of Black Ops II have been reported to be affected.