CurseForge · Minecraft mod
Undertale after pacifist
this mod let's you play as the undertale cast
Quick answer
Which Undertale after pacifist release should I use?
Undertale after pacifist COMMUNICATION AND EXP targets 1.20.1 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Undertale after pacifist required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Undertale after pacifist COMMUNICATION AND EXP need?
COMMUNICATION AND EXP. Change the file and its required mods may change too.
Install GeckoLib first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Undertale after pacifist without breaking your instance.
Built for Undertale after pacifist COMMUNICATION AND EXP. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use COMMUNICATION AND EXP. It targets 1.20.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install GeckoLib first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside COMMUNICATION AND EXP. It opens that exact file at the source.
About this project
What does Undertale after pacifist add?
UNDERTALE AFTER PACIFIST
hey guys sans here this is a rework of the description due to it being outdated so i'll explain everything since as of writing this pap is taking a nap
keybinds:
music: G
primary: R
secondary: V
third move: H
rest: unused
on to the roles
scroll down on how to start
me(sans):
Stamina 500
passives:
i dodge every attack by teleporting it's a random 5 block racius where i'm looking (or you i guess idk)
KR yeah uhh it ticks down 1-10 seconds i forgor btw but it only takes targets down to 1 hp so use it to weaken
primary: bone throw
fires a bone either to the left or right side (easy as that)
secondary (don't got one)
X: (yeah i'm the only one with one of these keys)
freezes time aka all mobs will freeze your bones tho
third move:
Gaster Blaster
this is the famous one it spawns a blaster 4 damage hits twice 10 blocks in front of the skull
oh my bro woke up here paps do your moveset
THANK YOU SANS
THE GREAT PAPYRUS' COOL STUFF
STAMINA IS 400°
WELL I DON'T KNOW WHAT ANYTHING MEANS BECAUSE....I DON'T KNOW
SO HERE ARE MY 'PASSIVES'
I FALL UP (paps that's a debuff) I KNEW THAT ALSO YOU CAN DISABLE OR CHANGE HOW LONG YOU GET THE FLOATYNESS OF PAPYRUS
YOU CAN JUMP IN THE AIR
FALL DAMAGE DOESN'T WORK
OK FOR MY MOVES
PRIMARY OF COOLNESS:
BONE THROW
I KNOW WHAT YOU'RE THINKING HUMAN
"WOWIE PAPYRUS WHY DO YOU HAVE THAT MOVE DOESN'T SANS HAVE IT"
YES BUT I FIRE 3 BONES WITHOUT KR
SECONDARY:
BONE RAIN
50 BY 50 BLOCK RADIUS SANS WROTE ON THE NOTE THINGY I ATE
IT RONDOMLY SANS DID I SPELL THAT RIGHT? (bro it's "randomly")
THANKS SANS ALSO THAT'S IT I HAVE 680 HP...SANS WEREN'T WE GOING TO ASK EVERYONE ELSE
no bro they didn't answer
ok for undyne
like. 600~ I'll check
passives:
can come back from dead 1/4 chance
around 690~ hp
primary:
pick up an entity then push again to throw them
secondary:
spear
fires a number of spears depending on your hp
and for Toriel
(btw bad time but stamina exists moves cost it i left it out because i want people to figure it out also because i'm lazy)
primary:
fire jump
5 fireballs are FIRED out from the feet in the direction you look
secondary:
heals and buffs everyone around you
(why did i want to rework my description this is a lot of work)
ok for Frisk (i know i'm missing stuff i'll go back and give hp values and stamina later)
primary:
cycle through FIGHT, ACT, MERCY, and ITEM
left and right click to use selected stuff
[check comments for secret]
ok for [ERROR]
huh that's odd
eh
1/200 chance to play as...HIM every second
find out the rest
Asgore
primary:
fire wall
literally a wall of fire
secondary:
close enough he sets anything on fire nearby with this one it's completely invisible
ok for the newest our guest star that i'm reading from a note
our newest character METTATON take it away so i can nap
HELLO THERE MODDERS
I HAVE WHAT IS CALLED PASSIVES
I HAVE A BATTERY (due to being a machine you can charge with redstone don't run out you'll look like a fool)
i cannot take damage
sans thought it was funny to make me be able to hurt people when i sprint just bout anything...because i accidantally ran into someone
primary:
a slap.....that's it...uhh....we ran out of ideas
secondary:
ohh my favorate asks a random question if wrong and ZAP you get shocked
and that's it i'm a work in progress
COMBOS
ok back to me(sans) here is the combos they are made for multiplayer but i left debug commands for singleplayer
LAST BREATH
to play as
singleplayer: /lb [phase you want]
multiplayer: MAX VOID THE EXPERIMENT IS INTERESTING RIGHT CLICK MY SON
huh weird i didn't type that
all phases differently
phase 1 just me but more stamina
phase 2 blocks attacks and fast and dangerious
phase 3:
ERR
huh odd eh figure it out
[last breath by original creator]
Disbelief Papyrus
"sans why"
because my bro was yelling "dis beef" also it's a cool au
[disbelief by flamesatgames]
phase 1 blocks attacks
phase 2 until you have %75 percent of hp you're fast dangerous
phase 3 run if you fight him
phase 4 his moveset is randomized 3 times
that's it for now
oh wait how to start
use /Role [character] to play as them
UNDERTALE BY TOBY FOX go support him through DELTARUNE
You may use this mod in your modpack but you must ask me first
i am aware of thrid parties having my mod up i do not like that it kinda feels like they took my hard work always ask if you may distribute elsewhere (answer will always be "no")
Project description from CurseForge.
Pick your setup
Undertale after pacifist by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Undertale after pacifist versions and loaders
COMMUNICATION AND EXP
yourmod-5.6.0.jar
8 Nov 2026
models!!
yourmod-5.0.0.jar
22 Aug 2026
600 download milestone thanks guys
yourmod-2.4.0.jar
15 Aug 2026
PHONE PUBLIC TESTING
yourmod-2.3.0.jar
29 Jul 2026
THE HOPLESS AND THE EXPERINCE --MTTBRAND COLLAB
yourmod-2.2.0.jar
12 Jul 2026
Friends and family part 2
yourmod-2.0.0.jar
22 Jun 2026
FRIENDS AND FAMILY PART 1
yourmod-2.0.0.jar
13 Jun 2026
LB public testing
yourmod-1.2.3.jar
5 Jun 2026
GTEST
yourmod-1.2.0.jar
24 May 2026
1.0.0 unfinished
yourmod-1.0.0.jar
17 May 2026
Looking for an older file? The official CurseForge project page is in Resources.