There are numerous secret areas, shortcuts, and other hidden secrets. Some of these can help with speedrunning by providing you with secret ways to get through the area, while others are just interesting areas to find or relate to other secrets (such as the audio Easter eggs).
Use the video guide below to help you locate some of the hidden areas you might have missed.
There are several audio Easter eggs in the game, little voice clips you’ll hear if you perform specific actions. Some appear to be the same voice, while others are different.