Robowarrior takes place on an alien planet called Altile. The player operates a cyborg named ZED (Z-type Earth Defence). In the game, ZED raids Altile to fight the Xantho empire and destroy its leader, Xur. ZED deploys bombs to clear a path through rocks, walls, and forests, while killing enemies and collecting items. Some gameplay elements resemble those of Bomberman (1983).

Robowarrior comprises five level formats. In one, the player must obtain a key before the time limit expires. In another, the key is unavailable until the player acquires a crystal or chalice. Some levels are cast in darkness, rendering obstructions invisible unless the player has a lit lamp. Still other levels are mazes in which a player must find and blast-through weak points in walls to proceed. Periodically, a player engages a boss level.

In 1991, Sunsoft published a sequel to Bomber King for Game Boy, titled Bomber King Scenario 2.