why this game is on steam but not Call of Duty: Black Ops Cold War and Call of Duty: Vanguard ???? because Reasons. Because the games were battle exclusive.. MW2 is available through battle and steam through their partnership mostly due to advertising..

About This Game\n\n Bushiroad's greatest card game, "Cardfight!! Vanguard Dear Days," has come to Steam! Over 1000 cards for the Standard format! A brand-new original story set in the world of overDress unfolds!