Altered Beast is a game that early on in the Sega Genesis' era, came with the system. You are playing as a character ( or characters in 2 player mode) that have been resurrected. You go through the game fighting various enemies, such as zombies,creatures,demons/ghouls,ect...As you play through each level. You encounter herds of oxen. When you see the blue ox, you must hit it to get a "power up". Your character becomes bigger & more powerful. After several blue ox encounters, you'll have transformed into a beast with powers! Each level you become a different beast. The 1st level you are the beast on the cover...A ware wolf type dude. Next level you are a dragon, then the 3rd level a bear,ect... It's a pretty basic and repetitive, yet fun game. When it first came out (on arcade and Sega consoles) it was a great hit! It still holds up pretty good for how old it is. The controls are simple. The music & sound effects are catchy. I'd recommend this game to anyone that enjoys old school classic games,sci-fi games,rpgs,fighter/beat'em up type of games.