Godmaster is the final chapter of the Knight's story. The free content pack features all-new characters, new quests, secrets, and new end-game bosses. It also includes a new game mode, more Delicate Flower recipients, and new music along with some remixes.

How long is Hollow Knight - Godmaster?
When focusing on the main objectives, Hollow Knight - Godmaster is about 9 Hours in length. If you're a gamer that strives to see all aspects of the game, you are likely to spend around 25½ Hours to obtain 100% completion.