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Comments (98)

What do you think?

ORA ORA ORA

i don't like how hard the knuckles boss fight or maybe that's just my skill issue

"Helper" bro i did nothing :joy: :v:

screenshot_2025-09-12_193731.png

back again. if you die to the spikes, you get stuck on them. also idk if its just in knuckles' first stage but if you get to 0 lives, the whole game restarts, idk if that was intentional

theres a bug where clones dont appear in tails boss figth, i e, you can beat the exe in 40 seocnds

Free

Undertale chaosfang fight mod

Version: 2.0.03 days ago
A fight with chaosfang but in undertale or something
Free

Sonic.exe : The Doomsday | Solo Endings Demo

Version: 5.1.3about 1 month ago
Every characters' routes with solo endings
Free

sonic.ex the doomsda full versio

Version: 0.0.0about 1 month ago
it's a joke build incase you didnt know
Free

Sonic.exe : The Doomsday | Knuckles Demo

Version: 4.0.13 months ago
Knuckles's demo i think
Free

Sonic.exe : The Doomsday | Tails Demo

Version: 3.1.14 months ago
Tails's demo i think
Free

Sonic.exe : The Doomsday | Eggman Demo

Version: 2.1.35 months ago
Eggman's demo i think

Plot

Rewritting the plot soon..


Team


Coder(s)

@MultyTheHedgehog (also the director)


Writter

@ringdaring


Spriters

Pineapplerin (they aren't on gamejolt)

Noah audio (they aren't on gamejolt too)

@CopiluCuSarmale

@BluedWf (left discord for some reasons but did some sprites, but consider he isnt part of the team for now.)


Artist(s)

@NinSmash

@cybercrewmatelol


Musicians/Composers

@riadlyn_station


Voice actors

@MSTTRB - Sonic voice actor

@GongasDubs - Exe voice actor

Eggman - NOT TAKEN

@therealashleythefox - Tails voice actor


Shoutouts :

@luigikidgaming

@LiNX_4

@SunFIRE

thankest thou for playing my game or smth


Other credits :

@KnownAsLuum - Did Chaosfang's textbox and a few sprites of him

Discord server

https://discord.gg/PmMz9SEUFv

Tags

#fangame #horror #platformer #survival #sonicexe #TheDoomsDay #TDD



teen
Mild Cartoon Violence
Mild Fantasy Violence
Realistic Violence
Realistic Bloodshed

Due to the game's server being dead as hell, I decided to deplace the game to @Empty-Name 's server (thanks empty for accepting this!!!) :

https://discord.gg/9V5nrjQwpu

The old server is deleted btw.

That was all, have an ice day/night!

Updated the unndertale chaosfang fight mod!

Undertale chaosfang fight mod is out!

Seems like one duo ending is done, 3 other duo endings are remaining now

The first duo endings im working on is going to be finished very soon!