You got a game in which the seller told you "was a Sonic game in which only one copy was made". You've never heard of a game like this coming out, & yet you take it since you thought "I don't think it's official, but if it's a fan game, I'll give it a shot.

You then come home & put the game in. The screen displayed the title of the game, "Starfall Sonic". You clicked enter & you play as Tails. You beat 3 levels like normal until the game glitched & the screen turns black with stars floating in the sky. Sonic stood at the middle of the screen, he looked at you with a worried expression on his face

"H-hey, you're back hehe...."