This is every single thing that inspired Deltarune! That I know of.... So Deltarune has inspired several different video games and naturally other older games have Inspired Toby Fox in the same way. This creative progression has me thinking of all the games that Inspired Deltarune and Undertale. The Majority of this video is based on a post Toby made during the Undertale 5th anniversary. So I am going through all of these games to try and analyze how they MAY have inspired Deltarune.
Today were talking about:
Earthbound
Touhou Project
Yume Nikki
OFF
Brandish
Cave Story
Gitaroo Man
Metal Gear Solid
Moon: Remix RPG Adventure
Illusion of Gaia
Lunar 2 Eternal Blue
& a few others.

Buy the Game
store.steampowered.com/app/1671210/DELTARUNE/

Buy Temmie's game
tuyoki.itch.io/dwellers-empty-path


Chapters

0:00 Intro
2:52 Earthbound
13:11 Touhou Project
17:26 Yume Nikki
32:23 OFF
36:09 Brandish
40:20 Cave Story
43:31 Gitaroo Man
47:23 Metal Gear Solid
52:08 Moon
56:09 Illusion of Gaia
1:02:08 Lunar 2 Eternal Blue
1:07:32 Speculation from here on
1:08:02 BOOM Community Section
1:11:36 Audio Inspirations
1:16:34 Final Inspirations
1:23:18 Conclusion

So there was a metric CRAP LOAD of properties referenced in this video so her is a massive list of videos used as references or for visuals.
CONTENT MENTIONED IN THIS VIDEO IN ORDER OF APPEARANCE.
PLEASE LET ME KNOW IF I FORGOT SOMETHING.

Connected fates
store.steampowered.com/app/3666320/Connected_Fates…
Innerwhy
store.steampowered.com/app/3623100/INNERWHY/
Hellescape
gamejolt.com/games/HELLESCAPE/1008210

XYGOR GAMING EARTHBOUND VIDEO
   • EarthBound Complete Story Explained  

Retro longplays
   • SNES Earthbound - Full Game Walkthrough / ...  

Let's Play Earthbound Zero Part 18 - The Forgotten Man
   • Let's Play Earthbound Zero Part 18 - The F...  

Goner kid footage
   • Goner Kid | Undertale  

ALL Deltarune chapter 3 game show name secrets and reactions
   • ALL Deltarune chapter 3 game show name sec...  

Toby Fox Tumblr post
fwugradiation.tumblr.com/post/20325508850/made-up-…

Fangamer OFF trailer
   • OFF - Available Now on Nintendo Switch and...  

BRANDISH LONGPLAY
   • SNES Longplay [391] Brandish  

Stoveplay: Brandish 3: Spirit of Balcan (PC-98) Part 10: Glaceir
   • Stoveplay: Brandish 3: Spirit of Balcan (P...  

psycho mantis cutscene
   • Psycho Mantis Reads Your Memory Card (PSX)  

MGS 2 playthrough
   • Metal Gear Solid 2 - Normal Difficulty Wal...  

MGSV: TPP - The Truth - Real Ending
   • MGSV: TPP - The Truth - Real Ending  

Lack of love footage
   • L.O.L.: Lack of Love Sega Dreamcast Full Game  

Illusion of gaia longplay
   • Illusion of Gaia 100% Walkthrough - Longplay  

Lunar 2 longplay
   • Lunar 2: Eternal Blue Complete - Full Game...  

Deltarune twin peaks video
   • DELTARUNE COMES FROM TWIN PEAKS - HOW IT A...  

Legend of zelda links awakening video
   • The Legend of Zelda: Link's Awakening - 10...  

Deltarune sound effects inspiration video
   • (2022) Deltarune Sound Effect Possible Ref...  

Mcdonalds commercial
   • Undertale: Flowey/Almalgam's sound clip or...  

I.M. Mean cutscenes
   • All  I.M Meen cutscenes (1080p HD)  

Super punch out credits
   • Super Punch-Out!! - Ending/Credits...  


TV Dinnah cutscene
   • Little King's Story TV Dinnah Cut-Scene  

Anooying dog joins the battle
   • ANNOYING DOG JOINS THE BATTLE?! (DELTARUNE...  

Snoopy come home OST
   • 1. Snoopy Come Home - Snoopy Come Home OST