Prototype


 * Weapons
 * AER14 prototype - an energy weapon in Fallout: New Vegas
 * Pulse rifle prototype - an energy weapon in Fallout Tactics
 * Tesla-Beaton prototype - a unique weapon in Fallout: New Vegas
 * Prototype UP77 "Limitless Potential" - a unique weapon in Fallout 4


 * World objects
 * Prototype Mister Handy - an antique world object in Fallout: New Vegas
 * Prototype sentry bot - an antique world object in Fallout: New Vegas
 * Protect-O-Bot - an antique world object in Fallout: New Vegas
 * Prototype eyebot - an antique world object in Fallout: New Vegas
 * Stealth Boy mark II prototype - an enhanced Stealth Boy in Fallout 3


 * Miscellaneous items
 * Prototype X-13 boots - a quest item in  Old World Blues, part of the stealth suit Mk II
 * Prototype X-13 chest plate - a quest item in Old World Blues, part of the stealth suit Mk II
 * Prototype X-13 gloves - a quest item in Old World Blues, part of the stealth suit Mk II


 * Other
 * Vault prototype - a prototype for the Secret Vault and the main base of the Texas Brotherhood of Steel in Fallout: Brotherhood of Steel
 * Prototype medic power armor - a U.S. Army variant of T-45d power armor in Fallout 3
 * MPLX "Novasurge" prototype plasma pistol - a paper note in Mothership Zeta