Trouble Brewin'

Trouble Brewin' is a side quest in Fallout 4.

Detailed walkthrough
Trouble Brewin' is a sidequest in Fallout 4. You get the quest from Rufus Rubins in the Hotel Rexford, located in Goodneighbor. Your task is to get Drinking Buddy, a Protectron modified to function as a microbrewing machine, from The Shamrock Taphouse and bring it back so no one has to keep drinking the barman's normal swill.

When you reach The Shamrock Traphouse, there will be a few easy raiders inside, an elite raider named "GAFF" who spawns upstairs, and mole rats down in the basement where the robot brewing machine is found, for the sake of ease just clear the building. When you enter the pub, the room upstairs on the door to the left is a room with a safe. when you get to the basement, you will notice that the quest marker is on the robot in the container. the security terminal to unlock it is expert level. There is a note on Patrick's Terminal that says he's stashed the password down in the basement. The password is on top of the shelves underneath a flashing red light - to reach it, you must jump onto the shelves from the stairs leading down into the basement.

Notes located on Patrick's Terminal in the basement indicate that the robot may be a bit frail, and express concerns about transporting him to the buyer. There is no need to be concerned- send Drinking Buddy to the Hotel Rexford. He will continue there without supervision and eliminate any obstacles in his way.

Occasionally his Protectron programming may cause him to deviate to chase an enemy. Once the enemy has been lost or killed, he will return to his journey to the Hotel Rexford. You will not receive an updated quest marker until you arrive back in Goodneighbor.

Once installed at the Hotel, you can ask Buddy to tell you a joke, receive a daily batch of beer from him, ask him where to find additional recipes or store any Gwinett or Nuka beverage in him, which will turn ice cold after 24 hours. Additional recipes are located on holotapes found in local bars and breweries around the Commonwealth, one of which can be found under a counter in The Shamrock Taphouse.

Alternatively, Buddy can be sent to a settlement of your choice, which will enable faster access to his services. You will be able to send Buddy to Hotel Rexford at any time after that, and the quest will not be considered complete until you do so and sell him to Rufus.