Sonic Crackers

An unfinished 1994 Genesis prototype

Sonic Crackers is an unreleased Sega Genesis prototype from 1994. It was developed by Sega, but it was never shipped as a retail game. The ROM header lists the name Sonic Studium, often read as a typo for Sonic Stadium. The title screen shows the date 19940401, which led to early April Fools speculation. Later evidence, including later Knuckles' Chaotix prototype builds, supports that this is a genuine Sega build rather than a hoax.

This is a rough engine test, not a complete Sonic the Hedgehog game. Physics are rudimentary, there are few interactive objects, and in-game sound effects are absent even though some audio exists in the ROM. Documented write-ups note that Sonic and Tails do not die in the usual way, and that a stage can end when the timer runs out.

Sonic, Tails, and the ring tether

You control Sonic and Tails together. They are joined by a ring tether, an elastic link that stretches as they move apart. Holding one character to stretch the link, then using that tension to sling the other, is the main idea of the prototype. Sega later reworked this rubber-band mechanic for Knuckles' Chaotix, released in 1995 for the Sega 32X. Sonic Crackers is a precursor to that game, not a substitute for the finished 32X release.

The build is commonly described as having two side-scrolling Attraction stages, early versions of layouts later associated with Techno Tower and Speed Slider, and two overhead Field stages. Field stages are isometric, with little or no collision, and jumping is not used there.

How to play in the browser

Start the game in the on-site Genesis emulator. A gamepad is the most straightforward way to play. On the title screen, choose 1P START, 2P START, OPTION, or SELECT.

In this prototype, A, B, and C all perform the same actions: press one to jump; hold one to make the partner stop and act as an anchor; if the two characters are close enough, a jump can pick up and throw the other character. In Knuckles' Chaotix those jobs were later split across separate buttons. Here they share one input, which makes movement awkward.

During play, Start is documented as a debug-style control that lets you move the characters' positions with the D-Pad, rather than a normal pause. Pressing A, B, C, and Start together resets the game. These details come from prototype documentation and have not been re-tested in this browser player.

A note on this build

Expect glitches, incomplete levels, and systems that do not behave like a shipped Sonic title. Play it as a historical prototype: a look at ideas Sega later reworked into Knuckles' Chaotix, not a polished platformer.