User blog comment:Cpt. Riley/Infinity Ward Co-Developing MW3 w/ Sledgehammer/@comment-86.129.18.196-20110124183011/@comment-99.63.77.156-20110126042802

treyarch does story and zombies and GUNS and PERKS while infinity ward does Multiplayer connection, map layout, and graphics. and then battlefield joins in and we get helicopters and shit lol