The product is an authentic Sega Master System game cartridge of Altered Beast, released in 1989 by SEGA. It is rated E for Everyone and falls under the Action & Adventure genre, specifically a Beat'em Up sub-genre. The game is part of the Altered Beast series and is designed for NTSC-U/C (US/Canada) region consoles. This listing includes the game cartridge only and is untested. It is a must-have for collectors or gamers looking to experience the classic gameplay on a Sega Master System console.