The Castle

Fallout 4 guide · reclaiming the Minutemen base

The Castle is a star-shaped coastal fortification that served as the former headquarters of the Minutemen. The Sole Survivor travels here during the quest "Taking Independence" to help Preston Garvey and a squad of Minutemen wipe out a Mirelurk infestation and clear out egg clutches across the walls and courtyard. Reclaiming the fort unlocks it as a major settlement and later allows access to its sealed armory and a powerful artillery support system.

Related quests: Old GunsTaking Independence

Items

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Guns and Bullets issue #5: On a small table next to the radio transmitter in the middle of the courtyardThe Last Minute: Sold by Ronnie Shaw inside the Castle armory after finishing the quest "Old Guns"Minutemen General's Uniform and Hat: Looted from the remains of General McGann in the Castle tunnels behind the armory security door

Secrets

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Castle Armory | Unlocked during the quest "Old Guns" by clearing rubble in the western bastion, traversing the underground tunnels past traps and a hostile sentry bot, and bypassing terminal-locked blast doors.

Enemies

Mirelurk

Weak to Face and soft underbellySteal / drop Mirelurk meat

Common variants found infesting the courtyard and outer parapets.

Mirelurk Hatchling

Weak to Shell or body

Tiny enemies that erupt from undisturbed egg clutches when approached.

Mirelurk Queen

Weak to Face and spoutsSteal / drop Mirelurk Queen meat

Spawns from the ocean gap in the southern wall as the final encounter of "Taking Independence", using ranged acid attacks and physical slams.

Sarge

Weak to Combat InhibitorSteal / drop Fusion cores

A hostile Sentry Bot guarding the basement corridors leading to the sealed armory.

Shops and people

Ronnie Shaw: Sells unique Gauss rifle "The Last Minute", weapons, ammunition, Minutemen gear, and general supplies once the Castle armory is unlocked.

Tips

Bring heavy explosive weaponry or a missile launcher specifically to deal with the Mirelurk Queen, as she possesses a massive health pool and strong armor.
Destroy every Mirelurk egg clutch in the courtyard and along the ramparts before the Queen arrives to prevent hatchlings from swarming you during the main boss fight.
Use the sturdy interior hallways and battlements as cover to block the Mirelurk Queen's acid projectile volleys.

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