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X4-18 is an Institute courser in the Commonwealth in 2287.
X4-18 is sent to Bunker Hill to aid the Sole Survivor in apprehending the runaway synths hiding there during the quest the Battle of Bunker Hill.
Interactions with the player characterEdit
- The Battle of Bunker Hill: X4-18 is waiting for the player character to help him and the Institute recapture the synths at Bunker Hill.
- X4 will turn hostile if the player character kills any of the synths they were supposed to capture.
- If the Battle of Bunker Hill is not completed, and the player character has not sided with the Institute, X4 can be found wandering around Bunker Hill.
X4-18 appears only in Fallout 4.