Undertale Effect 

When a video game becomes popularly hated due to its fandom as opposed to the game itself. Part of cringe culture. Often results in a hatewagon.

"Let's play Fortnite!"
"Eugh, why Fortnite? That game sucks. The community is filled with whining kids."
"Didn't you have the same reaction to Undertale? It was a good game but the community ruined it? Isn't most Fortnite hate just another Undertale effect?"

Undertale Effect by JTIG22 August 30, 2018

Undertale Community 

The perfect place to find all your favorite Undertale characters making out.

Did you see that great Toriel X Sans image in the Undertale Community? No, I only saw the "You're gonna have a bad time meme.

Undertale Community by pppom May 5, 2016

Undertale Multiplayer 

A cool Undertale FanGame which has a Discord server where you ask for the game and get banned.

Guy: Hey, when is the Undertale Multiplayer coming out?
Mod: get banned lol

Undertale Multiplayer by EDolphin March 2, 2021

Undertale last breath 

it is basically the undertale sans fight but 10000 times more hell

Person 1: Hey have you finished the sans fight
Person: No, but I have finished Undertale last breath
Person 1: IMPOSSIBLE IT IS TOO HARD TO BEAT

Undertale last breath by reaper sanesss December 27, 2020

Undertale Fanbase 

Young lunatics that have way too much time to draw rule 34 of their favorite undertale characters. They don't go outside much and skip school to masturbate to their trash undertale porn.

Guy : I saw someone from the Undertale Fanbase outside, unbelievable.

Undertale Fanbase by Demofisher January 1, 2022

undertale 2 

very cool itch.io gqme that i recommend playing (pc only)

Person 1: Ever heard of undertale 2? The itch.io game?
Person 2: i swear to fucking god bro our dialogues are getting weirder and weirder. Firstly you asked me about some shit named "Doki Buys Weed 4K", then the goofy ass ௹ symbol, AND NOW YOU'RE TALKING ABOUT SOME SHITTY ASS ITCH.IO GAME????
Person 1: But its go-
Person 2: SHUT THE FUCK UP BEFORE I FUCKING CHOKE YOU
Person 1: :(

undertale 2 by Corrozify May 23, 2023

Undertale haters 

Retarded people playing their shitty Call of Duty all day long and hates good games.

Friend 1: Hey, you wanna come over and play some Undertale?

Friend 2: Nope, im getting double xp on Call of Duty. Undertale is shit.

Friend 1:, Fuck you, youre just one of almost no one undertale haters.

Undertale haters by AsrielDreemurr#1 February 5, 2017