Sonic the Hedgehog 2 Beta (also known as the Simon Wai Prototype) is a widely distributed prototype of Sonic the Hedgehog 2 for the Sega Mega Drive/Genesis, which features an array of incomplete zones. It was found by Simon Wai on a Chinese website. This particular prototype of Sonic the Hedgehog 2 is one of the most popular examples of a prototype video game making its way to the public through piracy. However, this is official Sega software, albeit with some common pirate modifications (removal of logo/copyright info).