|Features in||Sonic the Hedgehog Spinball|
The Roboboiler is a large machine being powered by the powerhouse below, although the machine itself isn't particularly heavily guarded, the main danger is from falling out of the boss area and having to make your way back up to the top again. Inside the boiler is four machine parts spewing lava in the shape of Dr. Robotnik's head. Destroying all 4 will defeat the boss.
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