Vault-Tec: Prepare for the Future Vault-Tec Operators Handbook What Makes Him Feel So Safe? An Investment in the Fallout A Post Nuclear Role Playing Game D20 Guide From the introduction: This document is a non-commercial work based on the fictional post-apocalyptic world setting of Interplay Interactive and Bethesda Softworks’ “Fallout” video game series, and as such contains copyrighted material the use of which has not been specifically authorized by the copyright holders. User summary: This product partially is derived from Fallout D20, here adapted for play using Dungeons & Dragons (5th Edition).