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Stealth Boy mark II prototype

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Stealth Boy mark II prototype
Stealth Boy.png
EffectsStealth field
Base ID001445b0

The Stealth Boy Mark II prototype is a world object in Fallout: New Vegas.


The Stealth Boy Mark II prototype is an enhanced Stealth Boy, put through testing by the Enclave during the Great War. According to Doctor Henry, its purpose was to use less power and therefore last longer.

The player never actually sees the prototype itself. It is only seen used by Lily during the quest Guess Who I Saw Today.


  • The Stealth Boy Mark II prototype cannot be acquired in the game itself. Not even by killing Lily while she is wearing it.