Greetings, Devil Dog! Welcome to the Call of Duty Forums. It looks like you're looking forward to Call of Duty: Modern Warfare III, but haven't created an account yet. Why not take a minute to register for your own free account now? As a member you get free access to all of our forums and posts plus the ability to post your own messages, communicate directly with other members and much more.
Actualy you cant if you bought the game after dec 2021 (steam). Damn Activision ran out of on-line keys, they dont bother to inform about this in store description. They even shit down official support for WAW. The only way to play is to get the older key or use the modded servers