The Amber Diceless Roleplaying Game is a role-playing game created and written by Erick Wujcik, set in the fictional universe created by author Roger Zelazny for his Chronicles of Amber. It was published by Phage Press, but is currently out of print. You may be able to find secondhand books available on the internet. and a pdf can be downloaded through DriveThruRPG.
The game is unusual in that no dice are used in resolving conflicts or player actions; instead a simple diceless system of comparative ability, and narrative description of the action by the players and gamemaster, is used to determine how situations are resolved.
Despite the game’s largely out-of-print status, a thriving convention scene exists supporting the game. Amber conventions, known as AmberCons, are held yearly in Detroit, Michigan (AmberconUS), Portland, Oregon (AmberCon Northwest), and Belfast, Northern Ireland (AmberCon NI).