Toby Fox confirms Chapters 3 and 4 of Deltarune are content complete, undergoing localization, and Chapter 5 is in progress.

Toby Fox, creator of Deltarune, provided an update on the game's development in a newsletter marking Undertale's ninth anniversary. He confirmed that Chapters 3 and 4 are content complete and undergoing localization, with testing for Chapter 3 expected by mid-October. Chapter 5 is also in progress but will take longer to release. Deltarune, an episodic RPG, will have a total of seven chapters. The first two chapters debuted in 2018 and 2021.