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Z4K-97B is a synth living in the Institute in 2287.

Background

Z4K-97B is a hostile synth encountered in the Institute's reactor room during the quest The Nuclear Option with any faction. Z4K-97B, along with A-2018 and XPN-20A, will serve as the game's final boss during all endings other than the Institute ending.

Interactions with the player character

Interactions overview

Interactions
FO76 ui icon quest.png
This character is involved in quests.

Inventory

Apparel Weapon Other items On death
Synth uniform Institute laser Reactor terminal password

Notes

  • Z4K-97B wears a special variant of the synth armor which is jet black in color and can be shot off by focus fire and explosives, much like power armor.
    • XPN-20A and A-2018 wear identical sets of this unusual armor.
    • Said armor cannot be obtained via looting, pacify trading/armor swap, companion inspecting, etc.
  • Z4K-97B will always spawn as a legendary enemy.

Appearances

Z4K-97B appears only in Fallout 4.

Institute flag.png
Fo4 Institute Seal.png
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