Sega tried lots of spinoffs with their mascot, Sonic the Hedgehog, back when they were blazing trails in the blue blur’s heyday.

One such spinoff wasn’t discovered until much later, the puzzle game SegaSonic Bros., which the company initially tried to release back in 1992. Developed by Bubble Bobble creator Fukio Mitsuji, the game had an initial location test in Japanese arcades.

Unfortunately, the game did quite poorly, so Sega pulled the plug on the game and it never saw a nationwide release, nor a proper console release.

The game was later rediscovered online back in 2014, and now the full ROM of the game has leaked online as well.

Unlike most traditional matching puzzle games, you create lines and loops with different colored versions of Sonic the Hedgehog, while trying to defeat Dr. Robotnik yet again. Players can make lines horizontally, vertically, diagonally, and below one another.

You can view footage of the game below, via YouTuber Neo Reviews:

The four Sonic’s are randomly colored, and every ten levels you’re awarded a Chaos Emerald. It’s also worth pointing out every ten levels the background changes as well. Once you reach level 30, a fourth color, white, is introduced and you keep going until there’s no more room to drop extra pieces.