Uploaded November 2015 | Updated September 2026, 2 weeks ago

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"The secret hidden undertale ending where you pick up the tow rope at the core and save asriel. mettaton is there." - Nightmargin 2015
Quite honestly, I wish that was the case.

*SPOILER WARNING* DO NOT WATCH THIS VIDEO OR READ THE COMMENTS IF YOU WANT TO AVOID ANY POSSIBLE SPOILERS!


Music source:

Core OST - tobyfox.bandcamp.com/track/core

Core Sega Genesis Remix by Modeseven - soundcloud.com/modeseven-1/blast-core-processing-undertale-core-remix

Intro song "Mr Frustration Man" - youtube.com/watch?v=u1lDj_AZDF4


Picture source:

Grillby painting by zoruui (artist behind the art blog "ask grillby") - ask-grillby.tumblr.com/post/131533270820/hey-guys-the-askbox-is-now-open

Flying Mettaton pixel-art by Nightmargin - nightmargin.tumblr.com/post/131939380861/the-secret-hidden-undertale-ending-where-you-pick


Undertale Dual Mixes playlist - youtube.com/playlist?list=PLD90pe4VKFO8RBQdZnYYXEOgBV4F0cr6R

Introless version on Soundcloud (has a loop option) - soundcloud.com/iwannabethecollector/undertale-core-dual-mix

You can buy the game and/or soundtrack here:
undertale.com
store.steampowered.com/app/391540
tobyfox.bandcamp.com

Also check out Toby Fox's Twitter and Tumblr for fan-artwork and overall good humour:
twitter.com/undertale
twitter.com/fwugradiation
undertale.tumblr.com