Once We Were Gods 5e

In this one-player adventure for the 5th edition of the world's
most popular role-playing game, you will enter a swamp in search
of artefacts related to a fallen deity.
This book includes everything you need to play a solo adventure
over and over again without the need to purchase any other
rulebooks.
Once We Were Gods can be played as a one-shot or integrated
into an extensive solo campaign. GMs can also use it to practice
their storytelling skills and even create a pantheon for their own
worlds.