The game frames itself as a mysterious, unnamed ROM hack found on the internet. The central antagonist,

Sonic EYX (often stylized as Sonic EYX ) is a created using the infamous Sonic Worlds engine (a Clickteam Fusion framework). It gained notoriety in the early 2010s for its extreme difficulty, massive level design, and "edgy" visual style. The game features a custom character (EYX, a dark-colored hedgehog) alongside Sonic, Tails, and Knuckles.

🔍 Example filename: Sonic_EYX_v1.2_android.apk