Game avalible for free or to be bought cheeply.
Totaly worth to support by buying as game itself is amazing!
It is on steam https://store.steampowered.com/app/1127400/Mindustry/
yeah i said i bought it: https://steamcommunity.com/id/redpz
if you look in my games you will find mindustry, I played like 69 minutes. Nice