The chronicles of Amber influenced DnD, D&D

Gary Gygax lists it in Appendix N of the 1979 Advanced Dungeons & Dragons Dungeon Master's Guide, his published list of the fiction that shaped the game. Roger Zelazny is listed for the Amber series, whose true world casting countless Shadows beneath it, walked between by those who know how, belongs to the same multiverse thinking that shaped the game's planes.