Toby Fox, the genius behind Undertale, surprised the world once again with Deltarune — a mysterious, emotional, and hilarious RPG that expands his unique universe.
Even though the full game isn’t out yet, Deltarune already hides countless secrets.
Here are 10 fun and fascinating facts you might not know about Deltarune! 👇
🎭 1. “Deltarune” is an anagram of “Undertale”
Rearrange the letters of Deltarune and you’ll get Undertale! Toby Fox confirmed this isn’t a direct sequel or prequel, but rather a parallel universe with familiar faces and fresh twists.
🕹️ 2. It was released out of nowhere
The first chapter dropped on October 31, 2018, with no prior announcement. Toby Fox simply tweeted a mysterious download link — and the internet exploded overnight. 🎃
💾 3. The “suspicious” installer
The original download was called “SURVEY_PROGRAM”, leading fans to think it might be malware or some kind of trick. It wasn’t — just another piece of Toby’s signature mystery and humor.
💙 4. Kris’s gender is intentionally ambiguous
The protagonist Kris has no confirmed gender. Toby designed the character this way so players can project themselves freely, keeping the story neutral and inclusive.
💀 5. Sans might exist in both worlds
Even though Deltarune isn’t a sequel, Sans appears running his own shop. Fans are still debating whether this is the Sans from Undertale, or just an alternate version. 👀
🎶 6. The soundtrack connects to Undertale
Many of Deltarune’s tracks are reworked or evolved versions of Undertale songs. Toby Fox composed everything himself, and some tracks even hide secret messages when played backwards.
⚡ 7. The battle system mixes old and new
Unlike Undertale, Deltarune introduces team-based turn combat, reminiscent of classic RPGs — but you can still spare enemies instead of fighting them, keeping that signature moral twist.
🌒 8. The “Dark World” may symbolize the subconscious
Some fans believe the Dark World represents the inner minds or emotions of the characters. Each area could reflect their fears, hopes, or hidden sides — adding a layer of psychological depth.
🔮 9. Toby Fox left hints about future chapters
Through cryptic emails and interviews, Toby hinted that Deltarune will have seven chapters in total. Only the first two are out so far — and the next ones are said to change everything we think we know.
❤️ 10. There are secret (and creepy) endings
Depending on your actions, you can unlock hidden endings or alternate scenes that dramatically shift the story’s tone. Some are so dark that fans consider them “non-canon.” 😱
🌟 Final Thoughts
Deltarune isn’t just a game — it’s an emotional puzzle filled with humor, mystery, and symbolism.
Toby Fox has once again crafted a universe that makes us think, laugh, and feel, all at once.
And with more chapters on the horizon, the best is yet to come. 💫