Underfell Sans Boss Fight *GENOCIDE* | Deltatraveler [ DELTARUNE/UNDERTALE FAN GAME ]

(Spoiler warning: if you want to know why are we in this situation, go play the game yourself. You won't regret it! or well... watch my full playthrough if you don't want to.)
Okay i gotta warn you all that something in this video is pretty brutal so if you are a bit sensitive maybe skip this.
This is an amazing fan-game fight that actually took me a few attempts! honestly this just gets me more excited for whats to come next in this fan-game!
Get the game here!:
gamejolt.com/g...
Creator:
/ vyletbunni
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Main channel - / xsupremolucic
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Twitter - / xsupremoiucic
- Fan-Game description:
Kris and Susie (Deltarune) suddenly wake up on a flower bed in the world of Undertale. They, along with Noelle, must travel between different worlds to make their way back home.
This is an Undertale fangame that combines elements of Deltarune to create an interesting experience, both in gameplay and in story. If you haven't played either before, I'd highly recommend either playing them or watch videos on them before playing this. Heck, Deltarune Chapters 1 and 2 are free!
#undertale #deltarune #fangame

[@xsl]

By the way this fight only really changes at the end so keep that in mind *FULL OBLITERATION ROUTE* : kzbin.info/www/bejne/e3iuemSJrcSpm9E *ONLY SECTION 3 GENO* : kzbin.info/www/bejne/lYi4iImXj8Sqgsk *PLAY NOW* : gamejolt.com/games/deltatraveler/661464

[@thethundercat2943]

I love how Deltatraveler has multiple references and scenes from the original UnderFell animations. Such as the mail that tried to kill the player using bones. Underfell papyrus not being a completely edge lord and only pretends to have malicious intentions, but actually is still a nice goofball that loves puzzles. Not to mention, when Sans says, "I'm gonna have a great time." the font changes to the original "Vs Underfell sans" video. Props to the devs!

[@justme-u1q]

Same here

[@latte876]

@@r0z557 It's from Undertale

[@gachax5703]

Also how UnderfellGG wich is this version still retains Underfell Sans' "Great time" instea of Bad time lik undertale wich is something i found quite nice

[@_abowlofcoke6553]

it's because they're made by the same creator so the section is suppose to be an exact replica of the original with a few tweaks. As for the font, it's just a thing from og undertale where the font stops being comic sans when sans says "should be burning in hell"

[@gachax5703]

Also idk if anyone noticed but a lot of Fell Sans' attacks are taken from another fangame made by RynoGG/Sarah wich Is skeletal vengence

[@PabloFunHouse]

This sans really is flowey. "This world is kill or be killed" and being brutally killed swell.

[@godofhyperdeath2016]

Undertale Yellow Flowey?

[@Tumeton]

@@godofhyperdeath2016just flowey in general.

[@youyououmf8200]

In underfell, Flowey's view of the world and the world's rule are switched. In underfell, it's killed or be killed, and flowey don't want that.

[@Zimbabwae1]

​@@godofhyperdeath2016 not really since Undertale yellow flowey decided to trick clover into going to asgore instead of straight up killing them but there were probably runs where flowey just got angry and killed clover out of frustration like in neutral

[@KirbyGamerEX27]

6:03 so it CAN hit sans with a perfect bluster HIT

[@xsl]

bro i didn't even notice that i thought he was still distracted LOL

[@IrisMatos2]

Yeah and other party members can hit him aswell after perfect hit

[@dimitriy743]

Bro... this is the MOST brutal death,in undertale fangames community,what i ever saw...Like,not even death in earthbound section is closer to THIS

[@Zimbabwae1]

tbf dude this guy had it coming

[@Napsta-blook22]

I'm.....agree.....as...much as I can ...be...

[@Seeds-yeah]

7:43 sans really became horrorfell

[@ritedjmorsli6727]

Yeah

[@Brickproof]

Killerfell or spinfell

[@Whitmore231]

True

[@kaloz429mobile9]

Fellhorror

[@toothbrush-guy]

That was absolutely jaw-dropping.

[@DioBrando-gm6ke]

Nah, sans aint remember your genocides, he is remebers HIM genocides💀💀💀

[@marioluigibros.8176]

ive been deltaruined, whenever i see HIM in all caps, i think of gaster

[@kauanjos3199]

"Human I remember mine genocides"

[@overheavendio5665]

TBH out of all the sanses that were created, this has to be the most pure evil one.

[@8lFx]

Kris: Susie, obliterate this man. Susie, feeling a bit devious: Nah, I’d sell.

[@CROWNEDDOOMER682]

Damn that ending is brutal I guess temu sans deserves that after all he acted like FLOWEY he gloated about killing fell suzy i mean he practically dug his own grave And I thought quiet people pissed her off

[@SolsLuminous]

I feel like it goes both ways, very quiet people piss her off, but sadisticly loud people piss her off more

[@CROWNEDDOOMER682]

@@SolsLuminous This makes a lot of sense I was only going off of her dialogue but thinking about it this all makes a lot of sense at least quiet people are not nearly as psychotic as fell sans here he said that on purpose to piss Susie off I think I like the ending where he gets frozen seeing as he seems truly sad here he doesn't go out laughing he goes out sad and while normal sans is one of my favorite characters ever fell sans has lost all redeeming qualities so the ending that he is most sad and unable to laugh and piss off Susie more it's the best ending

[@RushWheeler]

Temu Sans is crazy 💀💀💀

[@jumpingbear2009]

well as starwalker woulda said it.. “these quiet people are pissing me off… im the original starwalker”

[@BreadBanks5490]

That death was jaw-dropping

[@kaysrandomchannel4618]

hehehe

[@omarkhalili6948]

Underrated detail: sans starts the fight at 79% hp because of 1:00

[@GelombangLautbahayanjir]

Oh, I understand now 🗿👍🏼

[@icelingbolt]

Fun fact! Only in genocide does sans deal Karma damage, which doesnt happen in pacifist

[@jarydgrobler9526]

He actually also does this in neutral. I only killed the end bosses of the first two chapters and he dealt KR damage surprisingly

[@JayZ69000]

I mean, that still would count as karma... bad karma.​@@jarydgrobler9526

[@legendary_wolfy9223]

Because kr happens only if you have LOVE

[@_Ceetu_]

@@legendary_wolfy9223 which is weird considering it was never stated in canon to be based off your LV, the interpretation mainly stemmed from its name when it could just be a general status effect he can dish out, but its cool. adds more depth to his character anyways instead of just being plain poison (in normal undertale anyways, i wouldnt call gg! underfell sans much of a judge)

[@oscarpro8349]

​@@_Ceetu_ he isn't a judge, he just wants to kill you (even if you haven't killed anyone), btw, canon sans just waited for you to get to max lv to kill you easier (he is a judge)

[@drrockstar4040]

You actually get more xp if you use iceshock for the final hit. Maybe deltatraveler will have a snowgrave and genocide route in the final game.

[@legendgames128]

Wait what?

[@Ink_Akane_Kurokawa]

Does the laugh that sans do while Susie brutally kill him is a original one or no?

[@imabrahamdc2464]

That sounds like patrick's laugh

[@Ink_Akane_Kurokawa]

@@imabrahamdc2464 how._.

[@Yousifis-66]

It does

[@Ink_Akane_Kurokawa]

@@Yousifis-66 ok

[@SpongeboyStudios]

kzbin.info/www/bejne/hHSknYJsirx8b68si=Hiss9ZQgpyVI5GX3​@@Ink_Akane_Kurokawa

[@voltfox2466]

Holy shit that maniacal laughter 💀

[@Yousifis-66]

Sans laugh is so fucking scary!

[@Yousifis-66]

But it also kind of sounds like Patrick.

[@SpongeboyStudios]

​@@Yousifis-66probably because it is!

[@nikolyo124]

bro, i literally took him to 0hp and he whipped his last attack out and killed me 💀

[@XtheOriginal1]

This Fell sans is unhinged. Killing a young orphan Susie. Also can someone please tell me then song name?

[@hellotherechap1784]

eye for an eye is the theme

[@DT_Player1]

GIVE ME YOUR SOUL

[@Brickproof]

GIVE IT TO ME!! GIVE IT! GIVE ME!! GIVE MEE!! GIVE *GIVE IT TO ME*

[@pacifistichuman82649]

*I WON'T BE DENIED AGAIN!!!*

[@TheAnimatorAzriel]

@@pacifistichuman82649I WILL..

[@LouX453]

​@@TheAnimatorAzriel i will.....

[@ankhangnguyenoan9205]

Well well well in 6:46 you just made Susie became a main character who can resist this Sans final attack. Also, click my comment to see this au's history if you don't know

[@ankhangnguyenoan9205]

If you want to know this au's history, well, it is RynoGG's Underfell. Here's the proof. You will need to find all the episode of it and this is just one piece of this au's story: kzbin.info/www/bejne/qWaniH2Hn9ikrNUsi=CEaBmHo1l1TaoNYr

[@NeonBlueLight]

How thematically appropriate that Susie survives given what happens after

[@thatguy1366]

So where the fuck is the AU's history

[@ankhangnguyenoan9205]

@@thatguy1366 It is in the link. A whole eps of this Underfell animation is history and information. Just click the link and click the creator or just search GG's Underfell

[@thatguy1366]

@@ankhangnguyenoan9205 OKAY THANK YOU,👍👍👍👍🦄

[@TheAnimatorAzriel]

The attacking sounds sync’d with the music here 2:47

[@kaysrandomchannel4618]

This fight made my head hurt, but it was really good! I like how Kris, Susie and Noelle went from chaotic evil to chaotic neutral, since it's mostly kill or killed in Underfell.

[@Michael72022]

Hey justwanted to point out that ghe karma effect isn't exclusive to obliteration you can get it if you kill an enemy

[@Amit_edits_5000]

The whole fight: 😆 The final: 💀

[@Dashgeometry-Officialツ]

Bro got more hits than last breath sans💀💀

[@gudmansal3468]

8:14 is just “i punched an orphan, what are they gonna do about it? call their parents?”

[@SGT_NUMBNUTZ2736]

RACIST MURDERER SKELETON GETS JUMPED BY THREE TEENAGERS

[@keionsonic30]

8:13 scared me idk why

[@skell6134]

Is Kris's weapon from secret Jerry fight ?

[@xsl]

yes

[@skell6134]

@@xsl Ok then

[@Deltarunefan564]

I just found out you can attack gg underfell sans off guard without distracting him by using red buster (or rude buster) after he dodges noelle can attack him off guard with ice shock I accidentally did this in my Pacifist run

[@o_3nitro2luol]

Easily my favorite character/fight in deltatraveler, I just love that this is "evil sans" lol, that's so funny.

[@ritedjmorsli6727]

Defeated sans its a bit scary 😨!

[@kyogreblue21o89]

8:18 omfg is that laugh sampled from Patrick????

[@glitchtherabbit9631]

WAIT HOLY SHIT

[@lucassalinas9836]

The owner slowed and sped up.

[@Fanofundertaleandvocaloid]

8:18 oh god that laugh is creepy

[@Conzisepiclol]

holy 45% of his face came off

[@CoqueiroLendario]

Specil [DEAL], 45% of [YOUR FACE] off! All you require for it is just a little bit of [Hyperlink Blocked]!

[@axosotll]

Ok, but now imagine SwapTraveler

[@TheOperator37]

The ending was... brutal

[@Napsta-blook22]

I don't know........the ending is more.... disturbing.... than....omega Flowey..... I'm glad that i never tried geno run in this game.......oh no.....i can't....forget...that scene....what....... should i.....do!?.............

[@Dustyskeleton99]

Dang he died so burtally to susie -

[@noaslebew7722]

Red sans remind me to hard sans,cause they have fire power

[@UncreativePF]

Sans in the thumbnail really pulling the laughing emote from Clash Royal

[@Oliver-FPE-erer]

Woah. That is one brutal death

[@nikidoAnik]

8:44 Two Hour Testament reference

[@aetherresonant9079]

Alright, so which Deltarune Integrity SOUL do you prefer? Dash or Slam?

[@Alex-gg9ht]

What does slam mean?

[@gamercentral2417]

@@Alex-gg9htfrom the Mike fangame you can slam down and destroy blue objects

[@gamercentral2417]

I think slam is more blue original meanwhile i can see bravery having the dash so slam

[@CarlosSilva-bh4bi]

NGL, this is my only reason you need to know why neutral is worth it in this game

[@Diamond_Man11]

8:18 that laugh 💀💀💀

[@HotdogBro12]

10th grade School bully vs 3 fifth grade student

[@duyanhbui5386]

it thêre a way to refight boss without a reset

[@saumyatyagi6763]

Don't save after beating him

[@sourandspicy]

Nice jerry pfp

[@La_Jupo]

Bro the theme is 🔥

[@ИльяБ-ы5ц]

bruh this fight for me more easy than original sans sorry im russian

[@brawlmaster0190]

It's not meant to be as hard as Sans This is only section 3

[@Kanny64]

​@@brawlmaster0190sans isn't going to be a boss in any of the next sections tho

[@Megaman-2407]

The ONLY reason it isnt as hard is because of Dual Heal

[@DiMon-ika]

​@@Megaman-2407lack of attacks also, most of them are the reused ones from an incomplete game

[@sora654able1]

...to be honest, me seeing the genocide fight like this is why I stuck to Paula's Pan, as I had a much higher damage output with it. hell, I was even able to do 132 damage with a single hit with it. The pan and the blade may have the same stats, but the pan being a quad weapon helps ensure it is a superior weapon, especially for bosses

[@RyanCardoso-ih7wf]

Ate o sans ganha do hypnos

[@michellecortes6808]

Hit has less damage than classi sans (9999999)

[@user-pool2nd]

sansがヤバ過ぎる!!

[@ryannicholls3432]

I thought this version of sans post hardrale sans or be mess up version of him? Fell sans make sense but i rather him golden tooth and his brother being mean

[@PoopDog-us5vz]

why did you make this video

[@eliseoarroyo3288]

I prefer a thousand times more the Sans from Underfell with the golden tooth and bad attitude than this Sans who is sick in the head XD

[@redsphinx113]

yeowch the edge

[@_q317]

nice

[@cat-1.00]

heheheha 8:18

[@gabrielnavia-d3m]

1:20 katana

[@ripdoombrins_limited4496]

No way it’s horrorfell

[@brawlmaster0190]

Nah

[@Kanny64]

Omg Sirin pfp hai!!!

[@evancrampton2936]

brutal

[@KDetron]

bloodbath

[@powerONdelta]

This fight is way too hard lmao

[@ValentinoAfton]

the animations are worse than anything I saw, but the fight's good so it oke

[@reiivitor6827]

This is so boring It's Just sans fangames

[@garsrandom4358]

kzbin.info/www/bejne/npvXmGedmbqHisk let me teell you that this comes from the SAME fan game

[@TheAnimatorAzriel]

Bro 80% of this game has nothing to do with sans

[@MatheusHenriqueSoaresdeMattos]

Its a cool fangame with EARTHBOUND,MARIO & LUIGI,TOON TOWN AND ZELDA

[@MatheusHenriqueSoaresdeMattos]

and ts!underswap

[@kauedasilva1072]

There are ways to avoid Susiie getting Devious. The first way is to make sure to pick options that sound like something Kris would say, AKA not the rude options.

[@quentonfrancis2616]

Or just, dont hurt her when you kill Lesser doggo... It still continues the Oblit Route.

[@kauedasilva1072]

@@quentonfrancis2616 I mean that also works, but…

[@bonny_69]

Its not fun :)@@kauedasilva1072

[@dynamitoriel9056]

Yeah....based on Susie Dialogues she definitely talking to *YOU* and not Kris

[@KrispBacon518]

Dumb question since jerry is a secret boss does it matter if you kill him or not? So if your on pacifist would killing him put you on a neutral route?

[@lucas_19486-Intruder]

For the red buster thing, I think it lets you do red buster, but susie can sabatoge you. When she has a shadow over her eyes, she wont attack or use rude/red buster.

[@quentonfrancis2616]

No, it will always be sabotoged to hit you.

[@superfrutamagmarratmann5869]

Sabotaged*​@@quentonfrancis2616

[@KirbyGamerEX27]

You're confused with the paula fight

[@Phantal_]

Rude buster is sabotaged when she has her eyes blacked out, but red buster will always be sabotaged

[@StudiosGATO]

Nope, if kris state is deceiful always will hit you even the game say it

[@tracey8121]

Notice how Fell still retains Sans's main weaknesses - laziness,predictability,and close to no actual defense.

[@rafsandomierz5313]

He actually has a lot of defense here.

[@tracey8121]

@@rafsandomierz5313 by actual defense i mean blocking your attacks

[@uberheroboi1233]

@@tracey8121Well.. in this world he has been killing alot so his stats would end up getting better as a result i think. If i recall how it went with Jerry at least

[@JacksonVoet]

His greatest weakness is his mental state really. Due to his ever degrading sanity, he can barely focus enough to dodge, and uses attacks that are far more showy and brutal without accounting for real difficulty due to his bloodthirsty overwhelming his calculating nature.

[@mm-ez6xn]

This version is better than the new dialogue...

[@pacifistichuman82649]

that ending is one of the most dark things ive seen ever

[@DieselMonstar965]

fr

[@Napsta-blook22]

.....yeah......I can't forget it.....

[@gabrielhenry5163]

8:23 where Susie just starts slushing that what he gets

[@gabrieldavis7128]

8:18 I wonder what episode from SpongeBob that laugh is from

[@nexliofc5]

its Culture Shock from season 1, but its resampled a bit

[@keionsonic30]

7:48 not expecting 6:45 he started laughing like flowey

[@Untitled_Bacon]

Btw where did. You get that cool sword?

[@Gamer767YTABRO]

Nah, dudes! Fell Sans is more creepier here, than at Underfell. Cuz at end he laugh like devil ☠️

[@Testingandfixing]

The most scariest is that he stronger MTT phase 1

[@sonicsspeedworkshop2979]

Shit, who just realised, Kris used his own knife (in deltarune) then the weapon equipped?

[@arloklenczon6811]

Can someone isolate Sans's laugh for me? I'd appreciate that very much.

[@untipogracioso3038]

Kris got the fire in his eyes

[@gabrielnavia-d3m]

6:26 you almost died (from the lack) of focus

[@thefooxman2486]

if you go with "you hit me" after you try and kill susie after the lesser dog fight i dont think she does the red buster thing

[@tomlee_bomlee]

i never realised before how neat the animation of Noelle getting an icicle ready is

[@tobizay]

damn, his death was brutal. he turned into pieces of bones

[@LimJonathan]

Well thats not the way to get lot tp in early i have the video how to get lot tp

[@saumyatyagi6763]

Bro said fk susie before dying 💀

[@ink_sac]

the thumbnail is just HEHEHEHAW

[@legendsiscool]

i think hes angry

[@Laerte_CD]

I will never take this character seriously 💔

[@jalalabdulmajid6997]

That definitely not underfell sans

[@FranciscoChuc104]

That’s just a really mad sans

[@FranciscoChuc104]

And with mad I mean he completely lost his mind

[@garsrandom4358]

ya right, it's GG!Underfell sans

[@sabrinacardinali8342]

people who want mercy ending 👇

[@I_Forgot_My_Name1]

Fake 100%

[@MrFell.]

How?

[@I_Forgot_My_Name1]

@@MrFell. yes