|Titanic Monarch Zone|
|Twelfth level, Sonic Mania|
|Number of Acts: 2|
|Level theme: industrial|
|Secondary level theme: urban|
|Boss: Phantom Egg|
|Sub-boss: Crimson Eye|
Titanic Monarch Zone is the twelfth and final zone in Sonic Mania, and is a brand new original zone. It is the final stronghold of Dr. Eggman and the Hard-Boiled Heavies, modelled to resemble a fusion of Eggman and the Heavy King.
Act 1 is a vertical climb outside the fortress filled with bumpers, plasma orbs that the player orbits until they jump off, and banners depicting the emblems of Dr. Eggman and the Hard-Boiled Heavies. Dotted around certain places are rocket cars piloted by Eggrobos that will jet forward once the player jumps in, accelerating wildly until they crash into a wall. There are also twin sets of poles that produce electricity, and while normally harmful, they can harmlessly magnetize the player if they have a Lightning Shield.
Act 2 is set inside the giant fortress itself, decorated with stained-glass windows depicting the Hard-Boiled Heavies, Eggman, the Chaos Emeralds, and the Phantom Ruby. By this point, Eggman has mastered control of the Phantom Ruby, and has used its power to create portals all around the fortress that lead to different places. Early in the act, the stage becomes nonlinear as the player chooses to go through four areas of the act in any order they choose. Once all four areas have been cleared, a portal appears to send the player to the final boss (really a separate act similar to the end of Lava Reef Zone), stopping the timer until the player reaches the boss (at which point it resets). Upon defeating the final boss, the zone explodes and the heroes will make their escape; should Sonic have all the Chaos Emeralds, however, the Phantom Ruby will react and send Sonic, Eggman and the Heavy King to the Egg Reverie Zone.
This zone is shown to have been built on the Little Planet, as it follows Metallic Madness Zone and the ending sequence shows the heroes escaping and watching the fortress explode on Little Planet's surface.
|Reference||Appears in||Source Game||Source Level|
|Yellow wall bumpers.||Act 1, Act 2||Sonic the Hedgehog 2 (16-bit)||Metropolis Zone|
|Yellow bumpers on the floor and ceiling.||Act 1, Act 2||Sonic the Hedgehog 3||Carnival Night Zone|
|Poles that the player swings from when passing them at high speed.||Act 1, Act 2||Sonic & Knuckles||Mushroom Hill Zone|
|Floating platforms that shift according to the player's weight.||Act 1, Act 2||Sonic & Knuckles||Death Egg Zone|
|Magnetic plasma orbs that the player can catapult from.||Act 1, Act 2||Sonic & Knuckles||Glowing Spheres Bonus Stage|
|The cables on the ramps, and the night sky.||Act 1, Act 2||Sonic the Hedgehog 3||Chrome Gadget Zone|
|Ball Hog's appearance.||Act 1, Act 2||Sonic the Hedgehog (16-bit)||Scrap Brain Zone|
|Pop-out horizontal springs.||Act 1, Act 2||Sonic & Knuckles||Sky Sanctuary Zone|
|Egg Robo's appearance as a crash test dummy.||Act 1, Act 2||Sonic & Knuckles||Sky Sanctuary Zone|
|Climbing up a giant building in Eggman's shape and entering inside it.||Act 1||Sonic 3D Blast||Panic Puppet Zone|
|The Crimson Eye, a mini boss similar to Red Eye.||Act 1||Sonic & Knuckles||Death Egg Zone|
|Giant gears.||Act 2||Sonic the Hedgehog 2 (16-bit)||Metropolis Zone|
|Phantom Egg's design based on the sketch of Dr. Eggman's unused boss suit from Sonic CD.||Act 2||Sonic the Hedgehog CD Beta|
|Phantom Egg's theme including a part of Sonic the Hedgehog 3's final boss tune.||Act 2||Sonic the Hedgehog 3|
|The final boss's missile reticle graphics.||Act 2||SegaSonic the Hedgehog||Map Screen|