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Weapons that deal amazing amounts of damage or NPCs even change aspects of the character themselves.
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Some of the items were meant to only be used by testing personnel. In the case of Fallout 3 and Fallout: New Vegas, there are many weapons that are meant to be out of the reach of the player due to the item belonging to a Non-Playable Character. So what are these things? Well, they can be anything from mission script, weapons, textures, or armor. Usually, these things are left by accident and can be found sitting in secret areas or brought into being via console commands. For the case of many of Bethesda's games, they even leave traces of these cut ideas in the game. Sometimes they are able to save the ideas for future DLC or games, but there are always things left behind on the cutting room floor. With any big video game project, there are a lot of ideas that do not make it into the game.
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