It's playable on PC or Mac and it's completely free.
Undertale creator, Toby Fox, releases a demo for new title Deltarune
No more Deltarune this year, but here's a look at what's coming
Deltatraveler (Video Game) - TV Tropes
Deltarune's next release is three chapters, costs more than
Deltarune's creator acts out whole chunks of the game to his devs
Undertale' Creator Releases New Mystery Game 'Deltarune
The entirety of the Halloween newsletter for those who didn't get
Dorky art and blogging ahoy!. — Deltarune Theory: Who Spoke to
Undertale Creator's New Game Can Be Installed Now
Undertale follow-up Deltarune launches chapter 2 this week
Indie game - Wikipedia