: The Tails campaign features 7 different endings, while the Knuckles alpha version has 8.

: This fan game features fast-paced action and strategic combat in a side-scrolling format. Players battle through levels filled with enemies to reach an end goal.

: Official mobile ports are often in development or available via community sites like Itch.io and Game Jolt .

: While the original game was largely abandoned, a "Complete Rehaul" project was announced in early 2026, with developers working on official Android and iOS ports. Sonic.exe: Project X (Horror Variant)

: For a safe and official experience, users can download Sonic the Hedgehog Classic directly from the Google Play Store . Project X: Love Potion Disaster - Download

: Includes hidden content such as a "Lord X" secret. How to Access and Security Warnings

For players seeking a darker experience, this version includes: