Mindustry (v140.4) is a sandbox tower-defense factory game where you build complex production lines to defend your base against waves of enemies. Version 140.4 is part of the "V7" official releases, which introduced major features like the Erekir planet, new units, and updated logic systems.
Create automated units for base management, resource mining, or direct assault on enemy cores. Mindustry Free Download (v140.4)
Build intricate belts, bridges, and junctions to move resources like Silicon, Graphite, and Metaglass. Mindustry (v140
Mindustry is inherently open-source and free on most platforms, though you can choose to pay for it on Steam or the App Store to support the developer. Mindustry Free Download (v140.4)