Quartet

Quartet is a run and gun video game released by Sega for arcades in 1986. Quartet allows one to four players to guide a set of characters through a base taken over by an army of robots. Players control either Joe (yellow), Mary (red), Lee (blue), or Edgar (green) across 32 side-scrolling levels. The object of the game is to advance through the level, fighting opponents which come out of portals in the walls, and eventually defeat a boss that carries the door key used to open the "exit door". The game was released as a dedicated four-player cabinet similar to Atari Games' Gauntlet. A 2-players version, titled Quartet 2, was released by Sun Electronics, as a conversion kit.