Sonic 1 and 2 is a hack of Sonic the Hedgehog 2 for the Sega Genesis by ColinC10, submitted as his entry for the 2010 Sonic the Hedgehog Hacking Contest. In addition to all Zones usually featured in Sonic the Hedgehog 2, this hack first features all Zones from Sonic the Hedgehog (16-bit), which have been ported, resulting in a continuous game experience from Green Hill Zone to Death Egg Zone. Both games' different kinds of Special Stages are available in all regular acts, and they are accessed through their usual method (Giant Rings for Sonic 1's, star post checkpoints for Sonic 2's). The player must beat all special stages from each game, thus collecting 13 Chaos Emeralds, in order to obtain Super Sonic.