I still remember the exact vibe of September 2021. Toby Fox, the mastermind behind Undertale, announced he would stream Deltarune Chapter 1 with Fangamer on Undertale's sixth anniversary. The date? September 15, at 4 PM PDT / 7 PM EDT. He said he would interact through a text-to-speech program and probably would not appear on camera. And I thought, okay, this is either a cozy nostalgia stream or the calm before a shadow-drop storm. Turns out, it was both.

If you missed the context, here is the quick catch-up. Deltarune Chapter 1 shadow-dropped online in 2018, and console ports arrived the following year. As its anagram title hints, Deltarune is a sequel-like retelling of Undertale. The story follows Kris, a human who lives in a world full of monsters. Kris and Susie, a school bully, arrive in the mysterious Dark World, where they are told they are heroes of legend. They team up with Ralsei, a resident of the Dark World, as they try to find their way home. Chapter 1 was only a few hours long, and it ended on a major cliffhanger. For a long time, we only had a few Deltarune Chapter 2 screenshots to chew on.

Why the 2021 Stream Felt Like a Big Deal

Toby Fox had made a number of comments about how work was progressing smoothly on Deltarune Chapter 2. He previously confirmed that a beta build of the game was being tested, which suggested it could be ready for release. It was once believed Deltarune could launch in 2020, but that date had long since passed. In the same update, Fox mentioned he was dealing with health issues related to his wrists, which likely slowed down production. So when he announced a stream on Undertale's anniversary, fans did the math. A livestream plus a milestone date plus a tested beta build? That smelled like an announcement, a release date, or even a shadow-drop.

And let us be real: Toby Fox is the kind of creator who loves a good surprise. The first chapter appeared out of nowhere in 2018, so nothing was off the table. The Annoying Dog works in mysterious ways, after all.

What Actually Happened

Spoiler for anyone who has been living under a rock: that stream did lead to Deltarune Chapter 2. It shadow-dropped right after the event, and the internet collectively lost its mind. I do not know about you, but I screamed. It was the payoff we had been waiting for since 2018.

Since then, the Deltarune train has kept rolling. In 2025, Deltarune Chapters 3 and 4 finally launched, giving us a much bigger chunk of the Dark World story. Now, in 2026, the conversation has shifted to Chapter 5 and beyond. The wait is still real, but at least we are not stuck on that original cliffhanger anymore.

What the Anniversary Stream Taught Us

Looking back, the 2021 stream was a masterclass in building hype without saying too much. Fox did not need a flashy trailer or a giant stage. He just showed up, played the game with Fangamer, chatted through text-to-speech, and let the community do the rest. That is such a Toby Fox move. It felt personal, weird, and completely on-brand for a game about a human, a bully, and a prince from another world.

It also reminded me that patience is part of being a Deltarune fan. We waited years for Chapter 2. We waited again for Chapters 3 and 4. Now we are waiting for Chapter 5. You know the drill. But the payoff is usually worth it.

Where We Are in 2026

As of 2026, Deltarune is no longer just a mysterious one-chapter experiment. It is a full-blown saga with multiple chapters, a massive fanbase, and a creator who still knows how to keep us guessing. The original Undertale anniversary stream is now a fun piece of history. It marked the moment the wait for Chapter 2 turned into a reality, and it set the template for future Deltarune surprises.

Will Chapter 5 get a similar shadow-drop? Will there be another anniversary stream? Will the Annoying Dog finally explain anything? I will leave the wild theories to you. That is half the fun.

So if you are new to Deltarune or coming back after a break, welcome. The Dark World is still open, the jokes are still weird, and the story is still unfolding. 🎮🐶⏳

Details are provided by PEGI, a key reference point for understanding how games are classified for age-appropriateness in Europe; in the context of Deltarune’s chapter-by-chapter rollout and surprise drops like the 2021 Chapter 2 release, checking official ratings guidance can help players and parents set expectations about themes and content as the saga expands beyond its original cliffhanger.