Since these are fan games and not official apps, they do not undergo the security screening of the Google Play Store. Check Sources : Only download from reputable fan-game communities like Permissions
Sonic fan games exist in a legal gray area. Because they use SEGA’s intellectual property (IP) without permission, these games cannot be sold on the Google Play Store. Consequently, users must download them from third-party websites. Unverified APKs from toxic forums or shady ad-sites often contain:
The safest method is to visit the or the Sonic Fan Games HQ (SFGHQ) . These communities maintain sticky threads with hash-verified builds specifically for Android.