With the Nuka-World DLC for Fallout 4, you can meet the violent Porter Gage. Such a tendency for killing comes with the raider territory as he's second-in-command of the Nuka-World Raiders.

Other than a very limited run to celebrate the launch of Fallout 4, Nuka-Cola has never existed in the real world. Even then it wasn't the same beverage as Vault Dwellers enjoy in the games since ...