Sonic the Hedgehog 3C (prototype 0517)/Comparisons/Hidden Palace Zone

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• The player does not run in at the beginning.
• The music is still Sky Sanctuary's theme.
• A Fire Shield is provided in place of a Ring monitor before the fight with Knuckles.
• The secret monitor stash still has an "S" monitor and extra 1-Ups.
• Entering a Bonus Stage and coming back screws up the palette changes, causing areas to be purple when they shouldn't be (e.g. the teleporter and the Master Emerald's altar). It also allows Sonic to backtrack to Knuckles' entrance.
• Knuckles can still hurt you when you have any form of invincibility state, including invulnerability states after getting hit, an invincibility powerup, and Super forms. He can even hurt you if you're in Debug Mode placing an object, at which point Sonic/Tails's graphics might be corrupted. (The corruption only seems to happen if you were Super/Hyper at the time.)
• The Knuckles fight still plays the Sonic 3 miniboss theme and continues to play through the Master Emerald theft scene after Knuckles is defeated.
• Various sound effects are still missing in the Knuckles fight and Master Emerald theft cutscene.
• Even though the controls are locked during the cutscene, Tails' controls aren't locked, and he will continue to use his AI if Controller 2 isn't used.
• The animation order for Knuckles punching the wall before the teleporter is different. He gestures for Sonic to follow after hitting the wall, instead of before.
• Hidden Palace when accessed by a giant ring works exactly like the final, but with a number of differences:
  • The HUD is still present (it's green while playing as Knuckles).
  • Death Egg Act 2 music plays (this is due to it coming right after the Death Egg Final Boss level slot in the game).
  • The intro plays every time you enter the chamber.
  • The greyed-out Super Emerald locations don't save after you leave (They reappear after the intro).
  • The laser zaps all the Super Emerald altars even if you already have that Emerald (Although it still shows that you have that Emerald).
  • There is no Super Emerald screen after you beat a Special Stage.
  • There are color differences in the prototype, probably changed so they could correspond with the colors of the Chaos Emeralds.
  • The timer is not disabled, making it possible to get a Time Over.