From Sonic Retro
Perhaps due to Shadow and Sonic's total xenocide in downtown Westopolis, Black Doom decides to get out of town after acquiring a third Chaos Emerald, demanding that Shadow accompany him with the other two emeralds thus collected. Sonic, however, wants Shadow's help again, this time to destroy the Black Tank.
Obediently follow Black Doom and Shadow will warp to the next stop in his whirlwind adventure, Prison Island. Destroy his precious Black Tank, however, and Black Doom will become pissed (for the first of possibly many, many times) and summon Black Bull to charboil Westopolis and Shadow. Beat Black Bull and Shadow will then wander about for that damn fourth Chaos Emerald before stumbling upon Circus Park.
Yet another highway built precariously high in the sky, one of the biggest dangers of Lethal Highway is falling to your demise. The road itself is crawling with Black Warriors, Black Larve and Black Hawks, intermixed with an occasional outpost of G.U.N. troopers or robots.
There are many scattered bombs that detonate and destroy sections of the road when approached, and Dark Spin Dash slime covering portions of the stage. Some of the broken debris and roadside fixtures can be utilized as melee weapons and some motorcycles, convertables, and SUVs still remain operational, allowing Shadow to run over whoever happen to be his enemies at the moment. Jump off ramps on steep declines to possibly nab an item monitor. Rockets and grab bars serve as additional gimmicks.
- Hero: Sonic the Hedgehog: Mission: Destroy the Black Tank!
- Dark: Black Doom: Mission: Escape from Westopolis.
The boss of Lethal Highway is a giant monster called Black Bull.