Plymouth Cold War is a custom colony game designed by BlackBox. Hooman and I recently fixed a crashing bug from how it called the SDK and make a couple of other minor improvements (version 1.0.2).
The mission includes an enemy AI base that must be destroyed.
You can find the current released version here:
https://github.com/OutpostUniverse/PlymouthColdWar/releasesTo play, unzip the dll and place it in the root directory of your Outpost 2 copy. The GoG version of Outpost 2 installs default to "C:\GOG Games\Outpost 2" on my machine.
I tested it, and the mission seems to work ok on the GoG version of Outpost 2.