Undertale and Deltarune creator Toby Fox tinkered with Earthbound romhacks very early in his game dev career, and that inimitable, SNES oddness went on to inform the RPG duo that so many fans know and love today. So it's only fitting for a crew of those fans to have spent two years painstakingly rebuilding Chapter 1 of Deltarune inside their own Earthbound romhack, which will be released for free this month. Chromadeline, one of the eight developers of the upcoming Earthbound romhack Bound to the Dark World, shared the news on Twitter alongside the reveal trailer for the project, which will launch for free on Friday, October 31, for all your Halloween needs. It's apparently been kept under wraps since 2023. "A project 2 years in the making. A ROMHACK of Earthbound that recreates Deltarune Chapter 1 in its entirety," the trailer blurb reads. "Experience Deltarune as if it were made in the 90s." Toby Fox says the "smart" way to make games is reusing what you can, but the way he makes Deltarune is "stupid": "Everything in the game is simply a container for a never-before-seen gimmick" Undertale's 10th anniversary stream included new areas and changes to the original RPG that might just connect it to Deltarune even more, and fans are freaking out Toby Fox doesn't think Deltarune Chapter 5 "will be released in the first half of 2026" but there's some good news: "we don't have any external factors surrounding the release date this time. We'll release it when it's done" Remaking (demaking?) Deltarune inside Earthbound feels like porting Stardew Valley to Harvest Moon 64, and if anything, the topline pitch might be underselling the effort here. "Every battle reimagined, every song remixed, every cutscene recreated, every sprite redrawn," the trailer boasts. "The hack of a lifetime" doesn't seem so far-fetched. "Please do not ask about Chapter 2," the trailer concludes. Here's the full list of Bound to the Dark World creators, per the reveal trailer: Chromadeline Isaiah Mark CoolMikeHaha Atlantixa Nes_cade Felix.rodent NOLI_KISSES PK HACK Rather fittingly, Fox said in a recent interview that the "smart" way to make games is to reuse whatever you can, but he knowingly makes Deltarune the "stupid" way since "everything in the game is simply a container for a never-before-seen gimmick." Even Chapter 1 of the game is full of unique scenarios, so even if it isn't terribly long, to see it translated "in its entirety" to Earthbound with this romhack really is impressive. 17 years after it was released, I'm tracing Undertale and Deltarune's origins back to Toby Fox's spooky Earthbound mod.