Here's how they work:
* Finding the Keys: You need to collect a certain number of gold keys within each stage. These are typically hidden in secret areas or require specific actions to unlock, such as performing a trick.
* Accessing Special Stages: Once you've collected enough keys, you can enter a special stage by finding a golden portal at the end of a regular stage.
* Rewards: Special stages offer various rewards, including:
* Emeralds: These are essential for unlocking the final boss and achieving a true ending.
* Chaos Emeralds: These are powerful items that can be used to transform into super forms.
* Extra lives: These provide you with extra chances to continue playing.
Key things to remember:
* The number of keys required for each special stage varies.
* The game doesn't tell you how many keys are needed, so you'll have to explore and experiment to find them.
* Some characters have specific abilities that can help you find the keys, like Sonic's speed or Knuckles' ability to break through walls.
So, the gold keys are more than just collectibles, they unlock challenging and rewarding special stages that enhance the overall gameplay experience in Sonic Heroes!