Toby Fox released the second chapter of Deltarune for free. He stated the reason behind his release of the game for free because of the "the world has been really tough for everybody recently", referring to the struggles of the COVID-19 pandemic.

Toby Fox shared additional details about Deltarune, confirming that all subsequent chapters were intended for simultaneous release, though they were not yet in development. Fox also mentioned that he had been working on the project since 2012, and that the idea for Undertale developed from Deltarune during production.