Chuck Rock is a classic platformer game first released for the Sega Genesis/Mega Drive in 1991, and later ported to the Sega CD in 1992. Players take on the role of the titular caveman, Chuck Rock, who must navigate through various prehistoric levels filled with dinosaurs and other prehistoric creatures. The Sega CD version features enhanced graphics, CD-quality sound, and additional content. The game showcases typical platforming mechanics of the era, such as running, jumping, and defeating enemies, as Chuck embarks on a quest to rescue his mate, Ophelia Rock, from the clutches of his rival, Gary Gritter.