Proto:Sonic the Hedgehog 2 (Genesis)

There are many interesting things in the prototypes of the Genesis Sonic the Hedgehog 2, most of which were sadly removed as development progressed.

General Notes
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If Tails jumps and hits an enemy after Sonic dies, the score will continually increase until the fade-out. This happens because, while all Badniks are frozen and can't be destroyed when Sonic dies, Tails can keep moving, gets stuck in an enemy, and continuously gains points – a bug that (as seen in the video at right) awards 1,452,800 points and nearly 30 extra lives.

This bug is present in all of the leaked prototypes, but fixed in the final – Tails immediately goes into his flying animation when Sonic dies, making the bug impossible.