Just Cause 3, the continuing story of a man with infinite grappling hooks and parachutes, is getting the same treatment as it's predecessor, with a multiplayer mod being developed by the same people. The modding team Just Cause Multiplayer is a group of programmers who dedicate their time to enabling Just Cause games to be played on communal servers. Their additions to Just Cause 2 are now available through Steam, and in a recent video they announced that they are in the process of working on the more recent third installation in the series.
Similar to the antics possible in GTA5, multiplayer Just Cause games are usually either a chaotic free-for-all of explosions and hazardous driving, or a spectacular competition set against a massive backdrop, like skydiving onto an airplane while the pilot maneuvers under bridges. Youtube has plenty to offer for anyone looking to see some action in-game, with a variety of excitable Let's Players to select as background noise.
The team of Just Cause Multiplayer provide server hosting themselves, and pay most costs out of pocket. This means that they rely on donations to help cover or defray these costs, but team member Trix has stated in a Youtube comment that they intend to continue hosting Just Cause 2 multiplayer servers. Though some feared that Just Cause 3 multiplayer would signal the end of support for older software, Trix said this is resolutely not the case. Because of this prospective increased server load, however, if you have a bit of cash to spare for a charitable cause the team could always use a bit of extra financial help.
These mods have been in development since 2013, and are liable to continue so long as the Just Cause franchise does. Just Cause 2 Multiplayer is available through Steam as a free mod, and the new Just Cause 3 multiplayer mod is expected sometime in the new year.