The Prologue is the first chapter of Celeste, coming before the first chapter proper (Chapter 1: Forsaken City). It gives the setup for the game, teaches the player the game's basic mechanics, and introduces three characters: Madeline, the Old Woman, and the Bird.
This chapter is fairly simple in terms of gameplay, with the only two objects present in the environment being the Overhead Platform Trap and the Collapsing Bridge. However, this chapter does teach the player two maneuvers—climbing and dashing—through the Bird. (Moving and jumping are not taught to the player at all.)
Old Woman (to Madeline): But you should know, Celeste Mountain is a strange place.
Old Woman: You might see things.
Old Woman: Things you ain't ready to see.
- Cheat Mode can be activated through Prologue, by starting the chapter and going to the left screen instead of going to the right. On a keyboard with default controls, input: Left - Right - Tab - Z - Up - Up - Down - Left - Z - C. On a controller with default controls, input: Left - Right - LT - RT - Up - Up - Down - Left - RB - A.This will then bring the player back to the chapter selecting screen, with all chapters, B-Sides and C-Sides unlocked, and will add a "Cheat Mode" stamp on the player's profile. Note: this won't collect any strawberries nor Crystal Hearts; and no levels are considered "completed".