It’s been a while since the last Deltarune update, and now creator Toby Fox (who’s also known for Undertale) has sent out a “Spring 2024” newsletter, detailing the latest progress.
After Chapter 3, the latest news is that development on Chapter 4 is “going better than ever.” He’s hired “a few more people” to help, and the team is on track to meet its internal deadline:
Toby Fox: “Chapter 4 development is going better than ever. We’re well on our way to meeting our internal deadline. The new hires are already making a huge difference in improving the atmosphere and feel of the chapter. I feel really good about this, champ.”
As for what’s left to do: there are some cutscenes that need to be polished, the battles are “technically done” but the flow needs to be improved for the boss battles, the overworld still needs “about 10 maps”, and there are tricks (with one complicated and all its repetitions almost complete).
Fox hopes that at least some of the team will have moved on to Chapter 5 by the next email update. As for the release date, that can’t be “discussed” yet, but it could still be “quite a ways off.”