User blog comment:JoMama69/For all those saying WAW was a commerical failure/@comment-4122733-20120228170039

The only reason it sold that many is because it rode off the success of MW. MW established CoD as a major player in FPS', so WaW had an ideal starting point: it was a CoD. Any of Treyarch's games that didn't have CoD in the title would have sold awfully.