Gunstar Heroes is a run and gun video game developed by Treasure and published by Sega. It was Treasure's debut game, originally released for the Sega Genesis in 1993. The game's premise is centered around a pair of characters, the Gunstars, in their efforts to stop an evil empire from recovering four powerful gems. The characters can fire guns and perform a series of acrobatic maneuvers to fight enemies across each stage. There are four weapons in the game which can be combined with one another to create different shot types. Development on Gunstar Heroes began among a team of staff working at Konami in 1991. Following an unwillingness of Konami to embrace their original game ideas, the team quit in 1992 and formed Treasure to see their project through. The team wanted to develop their game for the Genesis because of the system's powerful Motorola 68000 microprocessor. Sega initially rejected their proposal, but later granted approval after they had been working for Sega for several months on McDonald's Treasure Land Adventure (1993). Treasure worked on both games in parallel, and released Gunstar Heroes worldwide as their first game in 1993. Gunstar Heroes was a critical success, being praised for its frantic action and advanced graphics. It helped establish Treasure's place in the industry, and introduced several design conventions which would become characteristic of their later work such as large bosses and a unique sense of humor. It was re-released several times, including dedicated ports to the Game Gear and Nintendo 3DS, and received a sequel on the Game Boy Advance. In retrospect, it is considered one of the best action games of the 16-bit era, and one of the best video games of all time by several publications. 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