Mindustry

Mindustry is a top-down two-dimensional grid-based game, in which players assume the role of a small construction ship deployed from a central structure (the "core"). The basic elements of gameplay are resource extraction, transportation and organization, manufacturing of advanced materials and processing facilities, construction and maintenance of defensive and offensive structures, production of fighting units, and research of superior technologies.

The central goal of gameplay is for the player to avoid having their core(s) destroyed. All player structures are rebuildable upon destruction (with cores needing to be built atop dedicated "Core zones" equal to or greater than the size of the core that is built), with the destruction of all active core(s) resulting in immediate loss. On "survival" maps, enemies are dispatched in waves of progressively stronger units that must be destroyed before they reach and destroy all active core(s), similar to a tower defense game, as enemy pathfinding automatically seeks out poorly-defended areas or openings to break through. In contrast, "attack" maps have (in addition to waves of units) enemy structures and core(s) which must be destroyed to win.