Gunstar Heroes is a run-and-gun shooter video game developed by Treasure and published by Sega. Gameplay: Gunstar Heroes is a run and gun game played from a side-scrolling perspective similar to Contra. The game can be played in single-player, or cooperatively with a partner. The players take on the role of Gunstar Red and Gunstar Blue as they battle with an evil empire for control over a set of powerful gems. The game features seven stages, of which the first four can be tackled in any order. The stage formats vary; while some feature a typical left-to-right format, others have the player riding in a mine cart along walls, fighting enemies on a helicopter, or playing a board game. Completing a level grants the player an extension to their maximum health.