Jorune is a somewhat obscure RPG game setting, but many gamers will recognize the iconic Miles Teves art.
The background is similar to Tekumel, in that humans settle a world in the far future. But contact is broken and technology is lost, leaving humans to fend for themselves as just one of many intelligent inhabitants of an alien world.
Lair of the Maustin Caji
1984 … Andrew Leker & Miles Teves & Amy Leker … 47 pages … Skyrealms Publishing
Maustin Caji has the distinction of being written for the ultra-rare 1st edition of Jorune [see my reference site]. Ultimately, it is a comfortable dungeon adventure, Jorune-style. The party discovers a man who’d been held prisoner – unaged – for 20 years, and can lead the group to the lair of the rebellious Maustin Caji.