The singer replaced US model Kate Upton, the game's first promotional face.
Freemium developer Machine Zone stated 'Game of War' currently rakes in more than a $1,000,000 a day.
Game of War - "HERO" ft. Mariah Carey - Strategy MMO Game
As for the game trailer, Carey has filmed the commercial over two days. Terminator Genisys and Thor: The Dark World director Alan Taylor has directed the commercial.
Mariah Carey signs a multi-million dollar deal to promote 'Game of War' app featured @ RymatiCAST Mobile/Rymatica Entertainment. For promotional use only.