The Cursed Ring

From publisher blurb: The Cursed Ring: An adventuring party must retrieve a powerful magical ring, deep inside a forbidden fortress where madness awaits. This is a non-system adventure, designed to be adapted to any kind of generic fantasy TTRPG, or similar. The adventure is designed for a group of three players, or more, of low level. It has an estimated length of 5-6 hours and is easy to run for game masters!