Quartet for the Sega Master System is a side-scrolling action-adventure game with a strong focus on cooperative play. Released in the 1980s, it allows up to two players to team up as they traverse futuristic levels filled with enemies, obstacles, and power-ups. The objective is to defeat the end-of-level boss and recover stolen keys to progress. Players choose from four distinct characters, each with unique weapons and abilities, adding strategic elements to the gameplay. Its blend of platforming and shooting mechanics makes it an engaging example of the arcade-style action genre.