Farewell is the ninth and final chapter of Celeste, and was introduced as a free update to the game. The chapter introduces several new objects and utilizes highly technical mechanics, most notably, wavedashing and wall bouncing. In spite of its lack of a B-Side or C-Side, Farewell is intended to be the longest and most challenging chapter of the game. It is unlocked when Chapter 8 is completed, though depending on the player's progress, subchapters five and onward may be inaccessible.