"Hell contains ancient demonic artefacts that is said give an immense power for whoever gathers them all. They belong to demonic monarchs, locked up here by a superior entity that watches over the balance of the world. You're summoned by Mammon, Monarch of Greed, who created a team called the "Hell Diggers". As one of them, it is your duty to steal all the artifacts in order to give them to him... or to keep them for yourself, in order to use them for your own purposes."
On this project, I wrote the dialogues
of some dungeons, wrote items descriptions
and text logs, made a narrative design document
to help with the overall narrative coherence of the content, made character sheets
and participated in creating three dungeons
(narrative path, bestiary...)