I published an island for AGON: The Last Trial. It’s a final scenario for Agon’s campaign - but you can adapt it to play whenever you want.
On the island of Koilos, the Heroes will face contests at the limit of their abilities, and their wits and strength will be tested.
The island is inspired by Shadow of the Colossus, and I had a lot of fun writing it.
You can download it for free from my itch profile: https://matteosciutteri.itch.io/the-last-trial
If you play it, let me know what you think!