Undertale' Creator Releases New Mystery Game 'Deltarune

It's playable on PC or Mac and it's completely free.

Undertale Creator Surprise Releases New Game, Deltarune

Delta Rune – NintendoSoup

DELTARUNE on Steam

Deltarune development update and new look at Chapter 2 revealed

Delta Rune

Undertale Soundtrack - Wikipedia

New 'Deltarune' is looking to be a skele-ton of fun – The Californian

Undertale Creator Says Next Chapter Of Deltarune Is Almost Done

No more Deltarune this year, but here's a look at what's coming

UNDERTALE 2 by Zizou

Review: Video game excellently balances whimsy with fear – The Ithacan

No more Deltarune this year, but here's a look at what's coming

Deltarune Chapter 3 Development Update Shared By Toby Fox

Deltarune release strategy altered, will be available to purchase