RoboWarrior, known in Japan as Bomber King is an action / puzzle video game developed by Hudson Soft, and co-developed by Aicom (the first NES game they worked on). It was published by Jaleco for the Nintendo Entertainment System and the MSX.
RoboWarrior takes place on an alien planet called Altile which was created by scientists as a solution to the overpopulation problem of Earth. During a peaceful period on Altitle, Robowarriors are decommissioned from Earth and the Xantho empire invades Altitle and try to transform it for personal gain.
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 quite obviously resemble those of Bomberman.
RoboWarrior comprises five level formats and there are 27 levels in the game. 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. Multiple bombs are required to bomb certain unconventional areas. Robowarrior also features water stages. Enemies respawn in each stage allowing the player to stock up on bombs. ZED is controlled via an overhead viewpoint and the player can move him in four directions.
Like most Hudson Soft games, the Hudson Bee features in this game. Due to the games popularity, Sunsoft published a sequel to Bomber King for Game Boy, titled Bomber King Scenario 2, in 1991.