Private First Class William Hudson was a combat technician in the United States Colonial Marine Corps, part of 2nd Battalion Bravo Team. He was a member of the combat unit deployed to Acheron aboard the USS Sulaco in 2179, to investigate the sudden loss of contact with the colony of Hadley's Hope. He was subsequently involved in combating the Xenomorph infestation at the colony.
Hudson was part of First Squad's gun team, along with Private Vasquez. He was also the squad's leader, although Sergeant Apone assumed nominal command for the initial operation at Hadley's Hope. Hudson was also designated First Squad's Motion Tracker operator. He was among the last to perish in the incident, eventually becoming host for a Xenomorph Chestburster. His body was later found by Corporal Christopher Winter from the USS Sephora during a subsequent investigation of the colony.