We strongly recommend that you buy the game so you can support the developershttps://store.steampowered.com/app/71250/Sonic_Adventure_DX/
WHAT IS SONIC ADVENTURE DX
An ancient evil lurking within the Master Emerald has been unleashed from its slumber by the devious Dr. Eggman and is on the verge of becoming the ultimate monster using the 7 Chaos Emeralds. Only Sonic and his friends are heroic enough to put a stop to Dr. Eggman and his evil minions.
HOW DO I INSTALL SONIC ADVENTURE DX ?
1. Click the green UploadHub button and you should be redirected to the Download.
2. Once SONIC ADVENTURE DX is finished downloading, extract the .rar file. (You will need WinRar, you can get it here
3. Once its extracted, go into the games folder and right click the game and run it as administrator and Enjoy!