Development began after lead developer, director and programmer Christian 'Taxman' Whitehead, who was previously contracted by Sega to develop enhanced mobile ports of Genesis Sonic games, presented a playable prototype to Sonic Team producer Takashi Iizuka. The development team was composed of members known for their work in the Sonic fangame and ROM hacking community. The story follows Sonic, Tails and Knuckles as they venture to defeat their nemesis Doctor Eggman and his robotic henchmen, the Hard-Boiled Heavies. It takes place over 13 levels, including several redesigned from past games. Produced in commemoration of the Sonic the Hedgehog series' 25th anniversary, Sonic Mania pays homage to the original Sega Genesis Sonic games, featuring speedy side-scrolling gameplay. Sonic Mania is a 2017 platform game published by Sega for Nintendo Switch, PlayStation 4, Xbox One, and Windows.