For the Fallout "pen and paper" roleplaying game, you can download official character sheets, rulebooks, and starter materials directly from the following sources: Official Roleplaying Game Downloads
You can download standard and printer-friendly character sheets for humans and robots, as well as pregenerated characters, from the Modiphius Fallout Downloads page . download-fallout-the-games-download-zip
Various versions (like 1.1 or 2.0) of these community-made rulebooks can be found on document-sharing sites like Scribd or Internet Archive . For the Fallout "pen and paper" roleplaying game,
Official rulebook updates and errata are available for download. Miniature & Skirmish Game Resources Miniature & Skirmish Game Resources A collection of
A collection of lore and early design documents for a Fallout 3 project (Van Buren) that includes early pen-and-paper testing notes, often hosted as a PDF on sites like GOG. Fallout: The Roleplaying Game Downloads
Before the official 2d20 system, several fan-made "Fallout PnP" systems were created:
A free 64-page PDF on Modiphius containing basic rules and a starter adventure.