Mindustry is a production-ready tower defense / real-time strategy game with factory automation, built in Java using the custom Arc game framework. The codebase implements a full game loop: real-time simulation of blocks (conveyors, turrets, drills, reactors, logic processors), units with AI and abilities, procedural planet generation, multiplayer networking, a map editor, and a campaign progression system. The architecture is heavily modular: an entity-component system (ECS) provides composable unit behaviors; annotation processors (@Struct, @Remote, @EntityDef, @Load) generate serialization, network packets, and texture loading code at compile time; a block hierarchy with drawer, consumer, and ability interfaces enables data-driven content; and a versioned save system supports long‑running campaigns. The project includes dedicated tooling (icon conversion, map fixer, script binding generator) and supports modding via jar/zip loading and JavaScript scripting (Rhino). It targets desktop (SDL/Steam), Android, iOS, and headless server platforms through Gradle multi-module builds.