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.

For you, Treyarch has decided to LOCK the entirety of the Multiplayer/Zombies experience offline so you can't even play it splitscreen if the internet goes down.

The term "shell shock" originated from WWI and was used to describe a range of psychological and neurological disorders that resulted from combat. However, this term has since been replaced, and its scope expanded with the current term, PTSD, and there are refined criteria for diagnosing this disorder.

Battle Fatigue or Combat Stress Reaction (CSR)\n\n In World War II, the shell shock diagnosis was replaced by Combat Stress Reaction (CSR), also known as "battle fatigue." With long surges common in World War II, soldiers became battle weary and exhausted.