Despite the final title, UVG: The Final Update - Ultraviolet Grasslands & the Black City - A Psychedelic RPG Crawl was replaced by UVG and The Black City - Psychedelic Metal Roleplaying.
From the Introduction:
The Ultraviolet Grasslands (UVG) is a rules-light rpg pointcrawl module inspired by psychedelic heavy metal, the Dying Earth genre, and Oregon Trail games. It takes a group of ‘heroes’ into the depths of a vast and mythic steppe filled with the detritus of time and space and fuzzy riffs.
The UVG is for referees, game masters, judges, players, and fans of role-playing games who want to run a months’ long science fantasy Marco Polo-style voyage across a weird, old world.
The UVG is for any gamer who wants to mine it for inspiration, adventuring locations, odd characters, maps, items, and random encounters.
The UVG is also an artbook knitting together my art and maps and writing. Yes, every nut and fault, from layout to lamarckian monstrosity, is my own work.