Sonic Adventure ROM Download for Dreamcast on Emulator Games. Play Sonic Adventure game that is available in the United States of America (USA) version only on this website. Sonic Adventure is a Dreamcast emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Sonic Adventure 2 (En,Ja,Fr,De,Es), Sonic Adventure (En,Ja,Fr,De,Es) and Sonic Adventure 2 (Europe) (En,Ja,Fr,De,Es) as shown below. Sonic Adventure works on all your devices in high quality.