Extract your downloaded game file if it is in a ZIP or RAR archive.
It is important to note that Sonic R is proprietary software owned by SEGA. Downloading the ROM or ISO from random "ROM sites" is technically piracy and can be unsafe (often containing viruses). sonic r download android link
to Unreal Engine or other modern engines, many are incomplete demos rather than full game downloads. Avoid "direct APK" links for Extract your downloaded game file if it is
Sonic R Android: How to Play This Classic Racer on Your Phone sonic r download android link
For the fan port route (no emulation), search GitHub for "sonic-r-android" and look for the repository with active updates (last commit within 2 years).