I'm trying out some FOSS games.

Mindustry. I expected Mindustry to be a Factorio clone, but it's uniquely fast-paced and messy. I find it difficult to tell the buildings apart, though, so I may have to hunt down a graphics mod.

Beyond All Reason. I really enjoyed Planetary Annihilation, so this seems like a natural pick. I've barely sunk my teeth into it, but I'm impressed so far.