Mindustry

Mindustry: A sandbox tower-defense game.

Defend your base from waves of powerful enemies.
A high-level Mindustry base in combat with a wave of many low-level enemies.

Build complex designs for processing materials.
A peaceful Mindustry game with various end-game factories.

Build and fight with other players on multiplayer servers.
A peaceful Mindustry game with mid-tier factories while players wander and build.