The story is also simpler than those of the Sonic Adventure games. In it, series antagonist Doctor Eggman threatens to use a weapon to destroy the world and sends out legions of robots. 3 groups of three characters from the franchise's history separately team up to put a stop to Eggman's plans.
Image result for how was sonic heroes made Unlike the Sonic Adventure games, made using proprietary software, Sonic Team partnered with Criterion Software to use the RenderWare game engine so the game could be programmed and ported with ease to each platform.
