The Roblox game most likely being referred to is FNF: Lost My Mind / Lost to Darkness Sonic vs Xain. Search results tie “Sonic vs Xain” to that Friday Night Funkin’ mod name, and several sites list it as the playable version online.

What it is

  • It is a Friday Night Funkin’ mod, not an official Roblox game.
  • The matchup is usually described as Sonic vs Xain or Sonic vs Xain/Xenophanes.
  • Some pages also label it Lost My Mind or Lost to Darkness.

Why the name varies

Different uploads and fan sites use different titles for the same mod, so you may see:

  • Lost My Mind
  • Lost to Darkness
  • Sonic vs Xain

Best match

If you saw it in Roblox-style search results or a fan game listing, the closest match is FNF: Lost My Mind (Sonic VS Xain).