A bout a month ago I started playing Zero-K after many years of not having played RTS online.
The single player campaign is a lot of fun to play.
It is also curing me of some old bad TA habits of building to many defensive units.
Each level forces me to properly use a new combination of units.
Volunteer developers and LUA script writers: well done!
I am having fun.
Maybe I will even join an online battle.