REALMS OF PERIL is a classic fantasy role-playing game presented as a pair of jam-packed zines lavishly illustrated by the amazing DC Stow.
Simple but powerful d20-based core mechanic that encourage fiction-focused gameplay. Based on World of Dungeons by John Harper (creator of Blades in the Dark). Dice rolls determine not just success and failure, but whether you encounter cost, trouble, or mishap in your actions. Players do most of the dice rolling.
Created from the ground up for open-persistent gameplay (aka West Marches), focusing on exploration of a sandbox-style hexcrawl map, an "open table" (no set cast of characters or static group of players) and a shared, persistent gameworld (the actions of one set of adventurers leave their mark for future adventurers to see).