The full version of the game can now be purchased from itch.io. The purchase will come with a Steam key. I still have problems making a downloadable Mac Version here, but the Steam version does work on Mac, so you can use the Steam key here or purchase it from Steam if you want.

The version downloaded here doesn't have workshop support, so if you want custom maps and scenarios made by others, you have to download and put them into the right folders manually, or use the Steam version

Purchasing the game here gives me a better cut compared to Steam, so I really appreciate it if you do :)