Black Rip

A persistent co-operative role-playing world for you and a small group of friends, inspired by MUDs and tabletop role-playing games.
Take your friends into a pulp-fantasy world of dark forests, standing stones and unfriendly creatures. Start your own world and return to it between sessions. The world keeps the changes you make.
The aim is a narrative sandbox: your group's choices and the characters you meet shape a story that becomes part of the world's history.

Playing Black Rip
Examine the tracks around a strange stone. Call out to the goblins on the ridge. Block the path while your friends decide what to do. Describe your action in ordinary English; the game rules determine what happens, and AI narrates the result.
The people you meet have memories of their own. AI helps create characters and events, while the game records what happens. Your adventures become part of the world's history.
Build your own world
Black Rip is being built for modding. Bring your own setting, write its history, change the rules and supply your own art packs. Choose the world your group wants to play in.
For more on the ideas behind this, read about Multi User Domains.