Just Cause 2’s fan-made multiplayer mod is back in development and an open beta is underway right now.

The beta is the mod team’s fourth since the project was resurrected in June, and will support up to 5,000 players.

Until last weekend, the team’s biggest multiplayer test featured 1,000 simultaneous players on one server.

When the mod is finished, the development team have pledged to release the server code as well as the game code.

No official release date has been announced.