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Final boss (optional)
Z4K-97B is a synth living in the Commonwealth in 2287.
He 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 Edit
Interactions overview Edit
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.
Z4K-97B appears only in
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