14 Works in Cyrus (Sonic Underground)
Listing Works
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Sonic The Hedgehog: Thorn Chaos by Jord477
Fandoms: Sonic the Hedgehog - All Media Types, いばらの王 - 岩原 裕二 | Ibara no Ou | King of Thorn - Iwahara Yuuji
22 Oct 2025
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Summary
Sonic the Hedgehog is selected as one of the lucky few chosen to be put into cryosleep until the day a cure is discovered for the mysterious and fatal disease known as Chaos, but upon waking, the facility is overtaken by strange thorns and dangerous monsters! What happened? How long has it been? Will Sonic and his companions escape the facility alive? Or is this all just a dream?
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STH: Under the foundations by chai_ssr
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games), Sonic Underground, Sonic the Hedgehog: The Animated Series
18 Oct 2025
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Summary
In a world subdued by Robotnik. Sonia and Manic try to hold on to the fragments of a prophecy that no longer seems to guide anyone.
Then, fate throws them two strangers... Although, to their misfortune, the face of one of them is all too familiar.
Sonic and Tails. They don't know how they got here, or how to get back. But it's clear to them that they can't just sit idly by.A crossover between the Sonic games and the Sonic Underground series...
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STH: Bajo los cimientos by chai_ssr
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games), Sonic Underground, Sonic the Hedgehog: The Animated Series
18 Oct 2025
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Summary
En un mundo sometido por Robotnik. Sonia y Manic intentan aferrarse a los fragmentos de una profecía que ya no parece guiar a nadie.
Entonces, el destino les presenta a dos desconocidos... Aunque, para su desgracia, el rostro de uno de ellos les resulta demasiado familiar.
Sonic y Tails. No saben cómo han llegado hasta allí, ni cómo volver. Pero tienen claro que no pueden quedarse de brazos cruzados.Crossover de Sonic de los juegos con la serie de Sonic Underground...
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Summary
When Cyrus tells Sonic something she doesn't like, she realized she has a new adventure to do but on her own.
Series
- Part 12 of Sonic/Sonic Underground
- Language:
- English
- Words:
- 1,635
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 136
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Ready Or Not: Underground by goofnutgav
Fandoms: Ready or Not (Video Game), Sonic Underground
31 Jul 2024
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Summary
David "Judge" Beaumont is an LSPD SWAT sergeant who's been given command of a squad to deal with the growing crime wave in his city of Los Suenos, California.
But, just as he deals with a conspiracy he is somehow involved in, his whole world is changed forever by a tyrannical Roboticist and his army of machines, who invade his home dimension and throw everything into chaos.
Series
- Part 1 of Fight for Freedom
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Summary
Sonic gets a call and knows what she has to do
Series
- Part 12 of Female Sonic
- Language:
- English
- Words:
- 778
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 232
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Sonic Underground Remixed outline by Zippityzap103
Fandoms: Sonic the Hedgehog - All Media Types, Sonic Underground
29 Mar 2024
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Summary
DISCLAIMER: This is not a full fic, but rather the plot outline for a Sonic Underground reboot comic that I started in my teenage years but simply dont have the time to commit to and finish as an adult.
I'd hate the thought of all this work and worldbuilding never seeing the light of day so here is a chance for me and fans of the comic to get some closure. -
We worked with them but who are they? by Imanepilepticfreak
Fandoms: Sonic Underground, Sonic the Hedgehog (IDW Comics)
13 Mar 2024
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Summary
Prequel of Amnesia? Set at the beginning of Metal Sonic
Series
- Part 6 of We found Sonic
- Language:
- English
- Words:
- 5,566
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 121
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Summary
Sequel of ‘We have to find her’
Series
- Part 2 of We found Sonic
- Language:
- English
- Words:
- 4,998
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 242
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Summary
Sonic had left Sonia and Manic three years ago and now they have to find her
Series
- Part 1 of We found Sonic
- Language:
- English
- Words:
- 2,799
- Chapters:
- 1/1
- Kudos:
- 9
- Hits:
- 391
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reunited.. by Blueberrywriter10
Fandoms: Sonic Underground, Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Video Games), Sonic the Hedgehog (2020), Sonic the Hedgehog (Archie Comic), Sonic the Hedgehog (IDW Comics), Sonic the Hedgehog (Comics)
25 Sep 2023
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Summary
Years ago, Sonic and his siblings went to stop the evil Tyrant and deal his forces a large blow... That day, The resistance lost one of their greatest assets by a machine powered by chaos...
They thought the young blue hedgehog died, lost to the machine......
They don't know how very wrong they are....
Series
- Part 6 of Sonic the hedgehog fics
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These Words Are Knives That Often Leave Scars by NebulousStargazer
Fandoms: Sonic the Hedgehog - All Media Types, Sonic Underground
13 Aug 2023
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Summary
It's been six years since Nikki Hedgehog, one of the royal triplets of Mobotropolis, died fighting off Robotnik. It was the same day as her birthday.
Meanwhile, Sonic and all his pals have just been invited to a celebration in Mobotropolis: The sixteenth birthday of the Hedgehog triplets!
When his friends find out about the past and his family find out about the present, what could it mean for everyone’s future?
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Trevor Goes To Disney World by trevorballs69
Fandoms: tamers12345, Sonic Underground, Disney - Fandom
23 Dec 2022
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Summary
the worst fanfic ever
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Beware the Perils of Online Dating Book 4 The Fallen by CearaIvory
Fandoms: Sonic the Hedgehog - All Media Types, Sonic Underground
04 Sep 2021
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Summary
Sonia and Bartleby arrive in Robotropolis to the welcome of old friends from the resistance. Not recognizing them, Sonia was forced to admit that she had lost her memory. Revealing the depths of the injury, she referred to Robotnik as Father. Cyrus, still in love with Sonia, was heartbroken that she didn't even know them anymore and was hesitant to keep the secret. However, Bartleby warned that if her memory came back too hard or too fast then things could be made worse.
Series
- Part 4 of Beware the Perils of Online Dating