Altered Beast

Altered Beast (獣王記 Jūōki, literally "Beast King's Chronicle", in Japan) is a 1988 arcade game developed and manufactured by Sega. After its initial arcade release, it was ported to several home video game consoles and home computers. Makoto Uchida was the primary developer of the game and also was responsible for the creation of Golden Axe.

Altered Beast was converted/translated (not ported) to several platforms after its original release in 1988. It was released for Sega Mega Drive/Genesis, Sega Master System, PC Engine, PC Engine-CD, Famicom, Atari ST, ZX Spectrum, Commodore 64, Amstrad CPC, Commodore Amiga and DOS. Sega Smash Pack for Windows and Dreamcast and Sega Genesis Collection for PlayStation 2 and PlayStation Portable contained an emulated version of the Mega Drive/Genesis port. The Sega Mega Drive/Genesis version is particularly noteworthy as it was the original pack-in game for that system in North America, Europe, and Brazil.

Altered Beast was produced as a standard upright only with custom artwork on the cabinet. In most versions, the game's controls consist of an eight-way directional and three buttons, one each for "punch", "kick" and "jump". The game has single player and cooperative two-player modes.