User blog comment:Codguy1324/C.O.D Ghosts sucks!/@comment-71.194.87.135-20131121003311/@comment-119.224.82.11-20131126054116

it was brand new. COD4 engine was iw3, then cod5 used it as well (giant overhaul though). For MW2, they used IW4, which was reused in MW3. not sure about ghosts though