User blog comment:Callofduty4/Call of Duty: Black Ops Declassified details released/@comment-92.43.66.7-20120626083228/@comment-72.28.31.140-20120626160811

I hate it when people say games copy one another. Yes, game developers will incorporate things from other games to make theirs better or more interesting / fun. If you wanted to get into this whole copying thing then you could say CoD copies DOOM or Battlefield copies Wolfenstein etc. etc.