Altered Beast (USA, Europe) ROM Download for SEGA Genesis (Genesis) on Emulator Games. Play Altered Beast (USA, Europe) game that is available in the United States of America (USA) version only on this website. Altered Beast (USA, Europe) is a SEGA Genesis emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Altered Beast (JU) (REV 01), Monster World IV (USA, Europe) (En,Ja) (Virtual Console) and Sonic & Knuckles + Sonic The Hedgehog 3 (Europe) as shown below. Altered Beast (USA, Europe) works on all your devices in high quality.