The Amazon Underground version offers all IAPs free of charge without paying a single dime which means, you can play as Shadow, Cream, Silver, Knuckles, etc and get all the supers and what have you! Awesome!
Here's a screenshot I took myself:
You don't actually need such a high amount of red rings or coins but it's all free so you can get as much as you want. xD
*Classic Sonic is not available due to a timer or some technical reason.
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