There is the free and open source Beyond All Reason (BAR) inspired by Total Annihilation, which is very polished and a lot of fun. It's got features I've not se

There is the free and open source Beyond All Reason (BAR) inspired by Total Annihilation, which is very polished and a lot of fun. It's got features I've not seen anywhere else yet (in terms of possibilities for commands and customisation) and also has a growing competitive scene. It's worth checking out