Metallic Madness Zone is the eleventh Zone of Sonic Mania, which is based on Metallic Madness from Sonic the Hedgehog CD. Unlike the earlier Stardust Speedway Zone, both Acts take place in the Present.
Set inside Dr. Eggman's mechanical stronghold on the Little Planet again, Act 1 has elements from the Past version of the Zone as construction work is nearing completion, though the work cranes can still be seen outside through the holes in the dome, and the music is a remix of the Past theme. A new element exclusive to this act is that the see-saws now catapult the player into a second layer of level geometry in the background, which the player can then explore, returning to the foreground by using another see-saw. This is much like in Sky Babylon from Sonic Rush Adventure.
Act 2 goes deeper within the mechanical base, being based on the original Act 2 while also sporting the background from the Bad Future of Act 3. Alongside the return of some features of Act 2 such as the rotating wheels and the iron shutter puzzles, the shrink ray gimmick also returns, this time with an increased focus, as there are now several places where the player must shrink down to proceed through tiny passages and transport tunnels. The main boss is also fought while tiny. Sections where spiked platforms descend on the player have been made faster, as a hologram is now displayed above the section, showing where the safe zone is, followed by the platforms dropping at a much quicker speed.
From v1.04 onwards, Metallic Madness ends with the power cutting out on the entire Zone, and the heroes finally discovering Titanic Monarch Zone, a colossal figure towering above the construction site...
In Encore Mode, Metallic Madness Zone's foreground has a brown palette across both Acts, which is reminiscent of the original zone's Bad Future.
References and Easter eggs