Sonic - Project Hero is a 3D Sonic fangame & custom, closed source framework, made for the Unity game engine and developed by Hero. It aims to launch Sonic, Tails & Knuckles into, simply, a fun 3D adventure through various locales, to stop Dr. Eggman's new scheme. The game aims to introduce new and unique mechanics and mix-n'-match existing ones from the Sonic series, in order to create a fresh experience.