Deltarune Will Be Available For Purchase When Chapter 4 Is Done, Chapter 5 To Arrive Later - Game Informer

Undertale creator Toby Fox released the first two chapters of Deltarune for free.

Chapter 5 concept : r/Deltarune

Deltarune Chapter 3 is 'pretty much content complete' and will be releasing alongside Chapter 4, says creator Toby Fox

Deltarune Will Be Released Once Chapter 4 Is Done, Toby Fox Confirms - IGN

Deltarune Will Be Available For Purchase When Chapter 4 Is Done, Chapter 5 To Arrive Later - Game Informer

Deltarune Will Release Earlier Than Expected, But Have Less Content At Launch - Geek Parade

I made a fake chapter 4 secret boss : r/Deltarune

Deltarune Will Be Available For Purchase When Chapter 4 Is Done

I'll Ignore That (+ Added Commentary) : r/Deltarune

Deltarune Planned To Be Available For Purchase Once Chapter 4 Development Concludes; Substantial Progress Made : r/Games

The discussion of the century, should deltarune chapters 3-5 be released together or one by one? : r/Deltarune

Hellraid Preview - Techland's Hellraid Coming To PS4, Xbox One, And PC In 2015 - Game Informer

Deltarune will now be sold once Chapter 4 is finished – Destructoid