Deltarune is the next game from Toby Fox, the creator of Undertale. Chapter 1 of Deltarune was released back in 2018 and Chapter 2 of Deltarune is getting a surprise release today, nearly three years after the first chapter was released.
You might be wondering if Deltarune is a sequel to Undertale or how it is connected. Toby Fox has been very evasive in answering this question. According to Deltarune's website FAQ page, the two worlds are not connected. Despite this, Fox did not say definitively that Deltarune isn't a sequel to Undertale.
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Fox assures Undertale fans that "if you completed Undertale, the ending and world are as you left it" as well "if everyone was happy there, the people in the Undertale world will still be happy." This vague answer seems to convey the idea that Deltarune is not a sequel.
Fox later goes on to say that he doesn't know what kind of game he would call Deltarune, just that it is a game you can play after completing Undertale. As seen in Deltrarune Chapter 1 though, characters from Undertale have made an appearance in some form or another. So even if Deltarune isn't a sequel, it is still worth it to play Undertale.
For more information on gaming, check out Deltarune Chapter 3 Secret Ending Complete Guide, Where to find and how to use bukeberries in Valheim and How to get Valda Cui in Naraka: Bladepoint on Pro Game Guides.
Justin has been diving into fantasy worlds since he can remember. He is a certified nerd who has a deep love of reading, writing, and hiking. He has been writing since his college days, but specifically in gaming for two years. His favorite games are The Legend of Zelda, Pokémon, Hollow Knight, Celeste, and Banjo Kazooie.