So, I have been enjoying the multiplayer and decided to do the campaign for a change.
I started up Duke and they get through with the bounty hunter and I walk him to the door and ALL he will do is DRINK when I click my fire button. Gray does the exact same thing.
I I have changed difficulty, started a new game, verified files and it does the same thing.
I posted here, since the Steam forums are a slaughterfest of the game.