User Data
I Agree
Our Terms of Use and Privacy Policy have changed. To continue use of this website, you must agree to the Terms of Use and Privacy Policy.
Undertale CORE Corruption

Undertale CORE Corruption

by EcstaticShli
"we should have never left the core unattended."

An Undertale fan comic meant to take place after the true pacifist ending. Familiar faces will be seen along with some not-so familiar ones and all will go terribly wrong. Obvious spoiler warning here.

Undertale belongs to Toby Fox

Updates on Saturdays!

Support me and this comic here through my patreon! https://www.patreon.com/EcstaticShli
Add to Favorites
Pages
55
Updates
On Hiatus
Last Update
11 Months Ago
Fans
93
Readers
6

Patreon Goals

Undertale CORE Corruption

"we should have never left the core unattended."

An Undertale fan comic meant to take place after the true pacifist ending. Familiar faces will be seen along with some not-so familiar ones and all will go terribly wrong. Obvious spoiler warning here.

Undertale belongs to Toby Fox

Updates on Saturdays!

Support me and this comic here through my patreon! https://www.patreon.com/EcstaticShli

Recent Comments

Dawnable1324
September 30th, 2018
Awesomeness!
This is so cool! I am really likeing the style! It's so coool. 😉🤣😎😆
she be a demon child... I CAN TELL ^^
Naokii Fires
June 9th, 2018
I love the cover, definitely favorite comic ^^
owo this is so cool, I liked it so much I read the entire thing in one day ^^"
Familiarity
The plot bears a striking resemblance to Undertale Green, but with a few changes.
https://undertale-librarby.deviantart.com/gallery/62433282/Green
It's still cool, though.
Sans (Guest)
February 28th, 2018
Dude it's sans not sand. Plus I think that static should go to sans's house.
Pikachu (Guest)
November 24th, 2017
Awesome
Flower should escape and go after sand then static saves him.
Neolancer
November 4th, 2017
He know a "shortcut"
he know how teleport I wish I had that power
EcstaticShli
November 2nd, 2017
What could be going on back at the start of the ruins?

Find me also at:
http://ecstaticshli.tumblr.com/ - http://anocra.deviantart.com/ - https://www.patreon.com/EcstaticShli - http://corecorruption.tumblr.com/
EcstaticShli
October 29th, 2017
Enough chatter, time to move along! They're both likely too tired for much more

Find me also at:
http://ecstaticshli.tumblr.com/ - http://anocra.deviantart.com/ - https://www.patreon.com/EcstaticShli - http://corecorruption.tumblr.com/
EcstaticShli
October 25th, 2017
We got a name for the underground's new visitor! It's not what Sans was expecting I'm sure

Also, sorry for the lack of an update last week. I had pinkeye

Find me also at:
http://ecstaticshli.tumblr.com/ - http://anocra.deviantart.com/ - https://www.patreon.com/EcstaticShli - http://corecorruption.tumblr.com/
@Midwinter Hunt: but that face is funny not scary! O.o why do people see it scary? look its smiling!
Midwinter Hunt
October 14th, 2017
Sans sthap! you'll freak her out using your scary face
Captain Ghost
October 14th, 2017
Congrats on the 1 year anniversary!! -throws confetti-

I really love that last panel, hooo~
EcstaticShli
October 13th, 2017
I doubt Sans appreciated the earlier scare. Sheesh buddy. Went from 0 to 100 real quick there

Also! The 15th marks the 1st anniversary of this comic! Very glad I've stuck with it!


Find me also at:
http://ecstaticshli.tumblr.com/ - http://anocra.deviantart.com/ - https://www.patreon.com/EcstaticShli - http://corecorruption.tumblr.com/
Neolancer
October 7th, 2017
She's like um what happened
EcstaticShli
October 7th, 2017
@WiispNightmare: That would be the bad ending
@EcstaticShli: But what if there was >~>
EcstaticShli
October 7th, 2017
@WiispNightmare: Just a handshake. No pranks involved~
WiispNightmare
September 30th, 2017
Technically.
With a prank.
And a handshake.
Or something like that.