Just Cause 3: Multiplayer Mod update 1.0.8 is now live on Steam, and it's a required update. Clients and servers must match: 1.0.8 clients cannot join 1.0.7 servers, and 1.0.7 clients cannot join 1.0.8 servers. If you host a server, update your server files before players on the new client try to join.

The release follows 1.0.7, which got the JC3:MP client running on modern systems again. 1.0.8 brings the server build back into the release cycle, replaces one of the oldest parts of the multiplayer stack, and restores the project's forward momentum. The project says this isn't the update where every longstanding issue disappears overnight; it's the one that makes future updates more realistic.

• Multiplayer connections have moved to Steam's modern networking system.
• Server banners are back in the server browser.
• Join, timeout, and disconnect handling is improved on both sides.
• Package downloads and cache handling are more reliable, and file transfer failures are easier to identify.
• Player, vehicle, weapon, object, checkpoint, and world replication has been reworked.
• Server logs now carry clearer information about connection and sync problems.

• Update server files to 1.0.8 before players on the new client try to join.
• If players can't join, first verify both client and server are on 1.0.8.
• Server banner/advertisement support is restored.
• Package downloads are less likely to stall, and connection problems should leave clearer logs.

The new server build also brings improved player join/leave cleanup, entity streaming, world synchronization, and scripting diagnostics. The project describes 1.0.8 as a major step toward a JC3:MP that's easier to maintain, easier to host, easier to diagnose, and better to play, with more updates still to come.