This is not a game! This is additional content for the game Sonic Rumble!
What do you get after paying for the product? - great content:

1 . Skin Riders Sonic
Score Bonus
+10% (Max: +20%)
2. Sticker EX Gear (Sonic)
Allows you to share reactions with other players during battles.
3. Nameplate Riders Sonic Silhouette
Allows you to change the background behind your name.

Mobile users, please enter your codes on the official website:
https://sonicrumble.sega.com/input-code/en/
On PC, you can redeem the gift code bonus by clicking Menu on the upper right of the Home screen. Click on Settings and go to Gift Code to access the gift code entry page.