: Play as Sonic, Tails, Knuckles, Shadow, Silver, Amy, and even unlockable crossover characters.

Which specific of Sonic Project X (Horror, Action, or the Adult-themed fan game) are you looking to promote? Sonic.exe: Project X - Game Jolt

I notice you're asking about an APK for "Sonic Project X" — but I need to be careful here. Let me clarify a few things:

: It is not licensed, developed, or endorsed by SEGA.

If you download from a verified source (like a developer's official GameJolt page), it is safe. Always use a reputable mobile security scanner to check the file.

: Many of these games were originally made for PC. While unofficial Android ports (APKs) exist on third-party sites like Softonic or Uptodown , they are not "verified" by Sega or Google.

Ensure the app does not request unnecessary permissions, such as access to your contacts, SMS, or location. A fan game only requires storage access to save your progress. System Requirements for Android