GabrielElvery.Undertale’s Loveable Monsters: Investigating Parasocial Relationships with Non-Player Characters.„Games and Culture”.18(4),s.480,2022-05-29.SAGE Publications. DOI: 10.1177/15554120221105464.ISSN1555-4120.
SeanS.TraversSeanS., Nihilism, Violence, and Popular Culture:The Postmodern Psychopath in Toby Fox’s Undertale, „Journal of Popular Culture”, 2, 55, 2022, s. 411–431, DOI:10.1111/jpcu.13120, ISSN1540-5931 [dostęp 2026-08-27](ang.).
KevinK.VealeKevinK., “If anyone’s going to ruin your night, it should be you”: Responsibility and affective materiality in Undertale and Night in the Woods, „Convergance”, 2, 28, 2022, s. 451–467, DOI:10.1177/13548565211014434, ISSN1354-8565 [dostęp 2026-08-27](ang.).
ChristopherCh.CayariChristopherCh., The Music of Undertale: Participatory Culture, Video Game Music, and Creating Covers for YouTube, „International Journal of Education & the Arts”, 24 (22), 2023, DOI:10.26209/ijea24n22 [dostęp 2026-08-29](ang.).
Rachel WeberR.W.ContributorRachel WeberR.W., Fallout 4 wins best game at BAFTAs [online], GamesIndustry.biz, 7 kwietnia 2016 [dostęp 2026-08-30](ang.).
chart (tłum.), Nintendo Dream Interview with Toby Fox from 2018, „Nintendo Dream”, 298, grudzień 2018, Cytat: Why did you decide to call the game UNDERTALE? Toby Fox: I noticed that titles of two things I love the game EarthBound and the webcomic Homestuck both are made up of two words stuck together. So, for my game I wanted something similarly catchy. The title of a game I love in English is Cave Story. The word ‘story’ means the same thing as ‘tale’ so I swapped those out and the game takes place in the underground, so I used ‘under’ instead. Oh, right the developer of Cave Story recently put out a new game on Switch called Kero Blaster. Please give it a try! There are cute frogs in it!(ang.).
„chart (tłum.)”.Weekly Famitsu.„Weekly Famitsu”,09-2025.Kadokawa Game Linkage.Cytat: Over the past 10 years what do you feel is the most memorable moment from developing UNDERTALE? Toby Fox: In the scene where you reject Papyrus on their date I was originally planning on having it be a lot more harsh, but when I had a friend who loved Papyrus playtest it they cried... So I changed it..
RichardR.CobbettRichardR., Undertale Review [online], PC Gamer, 29 września 2015(ang.).
Chris SchillingCh.S.ConflictChris SchillingCh.S., y, Creature Comforts: How a Rule-Breaking Debut Became an UnexpectedC.C.: H.R.B.D.B.U.PhenomenonCreature Comforts: How a Rule-Breaking Debut Became an UnexpectedC.C.: H.R.B.D.B.U., The making of Undertale, „PC Gamer”, 5 maja 2018 [dostęp 2026-08-05](ang.).
Undertale for PC [online], GameRankings, 20 sierpnia 2016 [dostęp 2021-03-09] [zarchiwizowane z adresu 2016-08-20](ang.).
Ben „Yahtzee”B.„Y.”CroshawBen „Yahtzee”B.„Y.”, Undertale May Be This Year’s Best Written Game, The Escapist, 27 października 2015 [dostęp 2026-08-16] [zarchiwizowane 2017-03-15](ang.).
SeanS.TraversSeanS., Nihilism, Violence, and Popular Culture:The Postmodern Psychopath in Toby Fox’s Undertale, „Journal of Popular Culture”, 2, 55, 2022, s. 411–431, DOI:10.1111/jpcu.13120, ISSN1540-5931 [dostęp 2026-08-27](ang.).
KevinK.VealeKevinK., “If anyone’s going to ruin your night, it should be you”: Responsibility and affective materiality in Undertale and Night in the Woods, „Convergance”, 2, 28, 2022, s. 451–467, DOI:10.1177/13548565211014434, ISSN1354-8565 [dostęp 2026-08-27](ang.).