Call of Duty is a first-person shooter video game based on id Tech 3, and was released on October 29, 2003. The game was developed by Infinity Ward and published by Activision. The game simulates the infantry and combined arms warfare of World War II.

Call of Duty returns to its roots with Call of Duty: WWII - a breathtaking experience that redefines World War II for a new gaming generation. Land in Normandy on D-Day and battle across Europe through iconic locations in history's most monumental war.

If you're having trouble connecting to Call of Duty: Black Ops III, you should first check Call of Duty: Black Ops III Server Status. If the status indicator for your platform is not green or an alert is present, you might encounter connectivity issues until service is restored and fully operational.

Is Call of Duty Black Ops 3 online only? Bo3 is not a multiplayer/online only game. It has a great campaign *this is just a personal opinion*and you can make a custom multiplayer game where you play with a few friends or you can practice against bots. Hope this helps you out.