Mission Editor for Outpost 2

You can download the mission editor from the release page.

Mission Editor Releases

If you can create missions just fine, but the game crashes when you try to start it in Outpost 2, you may need the .NET Framework Runtime.

.NET Framework 4.7.2 Runtime

The editor should work "out of the box". Make sure you turn on the run permission for the .x86_64 file.

You must install the .NET Framework with Wine Tricks to get missions to run in the game.