Monument

Monument is a map drawing game about a team of adventurers following a mysterious explorer into uncharted territory. The explorer is obsessed with finding a legendary artifact, and may drive their team to their doom in pursuit of it.

The further you get into the unknown, the more ancient and dangerous the world becomes. It's a dark game that lets you create a world as you explore it, with a good chance of everyone dying. 

Monument is a GMless, collaborative, story focused, and improv heavy. If you do try it, please let me know what you think!