Island Fall

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While this may be an Undertale AU, this is nowhere near as friendly. This contains gore and traumatizing content. You've been warned.

### Link/s

Royalroad
Webnovel

## Contributors

### Composer/s

Western42

After a shipwreck, Frisk wakes up on a strange island they have never heard of before called Serphile Island. They quickly learn that the island is populated by animal and people who can use magic. They also learn that the entire island is populated and infected by parasites which can take over the world. With the Islanders holding a grudge against the outside world, the chance of the end of the world as Frisk knows it is pretty high. With their goal being to save the world and leave the island, Frisk sets out, meeting new friends and enemies as well as plenty of dangers and mystery. While on their journey, Frisk must think if they should kill the Islanders or not as even the animals here have thoughts of their own. What is the truth behind this island? And, more importunately, who or what is Luna?

## Characters

### Undertale Characters

#### Frisk

Frisk is a caring, smart, and clever person with an abundance of determination. Their gender is undetermined, called both a he and she by the Islanders. Their goal originally was to leave the island but changed after learning of the parasites. The main character, Frisk is rather fast to rust and help people. However, they are morally challenged by the choice of either killing the Islanders of leaving them alone. In the Extermination Route, or Genocide Route, Frisk will feel guilty all throughout and calls themselves a monster near the end. In every route, Frisk shows that they can easily manipulate people and, despite having weak magic, is capable of fighting head to head with the powerful animals and people on the island. Has the strange and dangerous ability to come back to life after dying called 'Saves', but they don't have full control over it.

#### Flowey

Flowey is a cute little girl that looks to be a mix between a flower, bunny, and human. She is cheerful and gives helpful advice. She is the first person that Frisk meets once they leave the Treehouse, selling flowers and information for money so she can support her dying foster mother and siblings. While her true self is an edgy tomboy, Flowey thinks of Frisk as their friend after seeing them multiple times. Despite her appearance, Flowey is quite powerful. A side quest in the main arc of Elber's Ridge allows Frisk to meet Flowey's family and her true self if they are friendly enough with Flowey. Even during the genocide route, Flowey will still be found doing business. While she'll be distrustful of Frisk, she'll still do business with them. If Flowey never finds out that Frisk is the killer, she'll lead Frisk to her house to help out with boarding the house up. Once there, Frisk can kill Flowey and her entire family.

#### Sans Elctor

Sans Elctor (El-ck-tor) is the mayor of Elbilissia. He is laid back and despite being a good mayor, thinking outside the box to solve their problems, his laziness can also rub off as being incompetent as if he thinks a problem is too "problematic", he won't help it. Sans is the second person Frisk meets outside of the Treehouse and despite his brother and sister trying to capture Frisk, Sans doesn't help out, sometimes even "sabotaging" the puzzles and traps his siblings laid out. Despite him not trying to capture Frisk, he gives them multiple warnings that he will kill them if they go 'too far'. After saying this, Sans will help Frisk out of Elber's Tunnel and will provide support in comedic relief and some information along with bad food. After Frisk leaves Elbilissia, Sans and his sister can be seen hanging around every now and then if he is friendly with Frisk. In the genocide route, Sans has three phases and is the mid-boss of the route, tied with Tulip. Calls Frisk a he.

#### Papyrus Elctor

Papyrus Elctor is the younger brother of Sans and leader of the garrison of Elbilissia. He is talk and though not as handsome as his brother, he is quite the catcher. His achievements in battle, training, and buildings have caused him to be seen as a natural hero, despite his child-like airheaded personality. Papyrus won't actually try to kill Frisk unless they purposely kill his sister first. If not, he will try and teach Frisk that what they're doing is wrong. Frisk can then kill them in one hit. Papyrus is a tough fight in all routes as he tries his best. In the genocide route, he cheats by setting up traps and using his personal guards to help him out. He quickly befriends Frisk.

#### Lesser Dog

Lesser Dog is a large dog with a playful yet dutiful personality. Well, he is also dumb. Lesser Dog can easily be tamed in his fight despite his hard-hitting deadly fast attacks. He is quite strong and has two phases in the genocide route. He can be found after his fight, if he is still alive, playing poker. Frisk likes him a lot.

#### Greater Dog

Greater Dog is a massive wolf with a caring yet fierce personality with an undying loyalty. They attack Frisk in both routes and if Lesser Dog hasn't been friended, the only way to escape them is to either kill Greater Dog or run into a cave. Greater Dog has two phases like Lesser Dog but is much harder. In every route except one, if Frisk escapes Greater Dog and runs into a cave, once they exit they will find Greater Dog still clawing at the tunnel entrance. Frisk can either drop a boulder on Greater Dog's head, killing them, or leave. After the fight, Greater Dog won't attack Frisk and can be found in the local bar, Local Bar playing poker with Lesser Dog and losing. If Frisk befriended Lesser Dog, Lesser Dog will step in and stop the fight with Greater Dog.

#### Toriel

Toriel is the daughter of a forgotten strand of mutation. She'll give Frisk a task to help free her people from a vicious officer keeping them as slaves. Since the king didn't help them, Toriel turns to Frisk despite knowing that Frisk is an outsider. If helped, Toriel will reward Frisk and stop them from fighting Asgore, her husband. In the genocide route, she'll buy time for the others to run away by facing Frisk down. Toriel has a very motherly and kind personality.

#### Asgore

Despite meeting Asgore before Toriel in Mudwock Village, Frisk never actually gets to meet him formally until later. He is a mercenary who works for the king in order to earn enough money or reputation to free his kind from the corrupt officer. He thinks Toriel's way of thinking will just cause more pointless casualties. He attacks Frisk because of this. After his kind is set free, Asgore attack Frisk again after getting orders from his king but if either Toriel has a high enough friendship with Frisk or because Frisk gets through to him, he will stop and say he will look the other way just this once. If Frisk has done more good than harm overall, Asgore will go unpunished from the king and actually be rewarded. If Frisk is neutral, Asgore won't be rewarded. If risk has done more bad than good, Asgore will be stripped from his duty and command and be put on watch. In the genocide route, Asgore attacks with an entire legion and fights Frisk to the death.

#### Chara Hopestar

Chara Hopestar is a lone little orphan girl who helps Frisk. Once Frisk completes the first run, they can come back and give Chara a white necklace belonging to her sister, Mary Hopestar. Chara is a hidden boss fight if Frisk's reputation is bad. They can easily be avoided but have two phases. They are quite kind but is depressed and socially awkward. Calls Frisk a she unflinchingly even if others say otherwise.

#### Asriel

Asriel is the son of Asgore and Toriel. He can be found once outside of his house and the next in his house eating dinner with his parents. He will ask for a playdate if Frisk is liked by Toriel and Asgore enough.

#### Berserk D. Allowe Dummy

Berserk D. Allowe Dummy (Al-low) is a berserk crazy insane human made of magic and dead bodies as well as souls and bones. The voices of the dead drove her crazy. Well, that and her vision of the future. She is friends with Luna and Della and is a part of the Star Club. She is an extremely hard boss and her only purpose seems to be keeping Frisk trapped in the Trash Bin with her. In the Silence Route, she will block the path, becoming the third-way boss fight and fighting as hard as Sans and Tulip, with her own twist in the fight. She has two phases. Once calmed down, Dummy will help Frisk. They will become shy towards Frisk and can be found later on in their house or in secret spots with Luna and Della. Talks about Luna but won't reveal anything about it if ever asked. Calls Frisk a she.

#### Monster Kid

Monster Kid can be seen occasionally while working up towards Elsa's Mountains but he will start actively working with Frisk to see his favorite villain, Valcien. Despite wanting to be her underling, Monster Kid thinks that helping Frisk, an outsider, would be more fun. He helps Frisk along the way and gives some backstory to Valcien. Depending on an unfair quick event, Monster Kid will be killed by Fsex. He can be easily killed by either fighting him or pushing him off the mountain and some point along the journey.

#### Ellin Gaster W.D Elctor

Ellin Gaster, or Gaster, is the biological parent of Sans, Papyrus, and Sisily. Despite their looks, Gaster has no gender. Can be seen every now and then but talked to after meeting them in a cafe. Frisk can help them out with their side quest of helping Luna, Della, and Dummy get back together with Sans and Tulip. In the Silence Route, they'll give Frisk a warning saying they have no idea what they are doing or who they are messing with. If Frisk doesn't leave the cafe, Gaster will attack Frisk, becoming the fourth hidden fight. Their fight is harder than Sans and Tulip but can be tied with Mary's.

### Added Characters

#### Macy Base

Macy is the sister of Hellin Base. She lives in a giant treehouse next to Common Shore. She takes care of most of the people that end up being shipwrecked. She also takes care of patients who have been too heavily damaged and are only kept alive by the parasites. Frisk gets sent to her by Ira and teaches them about the Island, including the parasites. Unfortunately, when Frisk tries to leave, Macy stops them. Depending on what Frisk does around Macy she will either fight Frisk or challenges them to a puzzle game. Macy has a pet mutated crow. Seems to be friends with Della and Irene. The very first person Frisk meets.

#### Ira Luna Seacic Heart

Ira Luna is actually the first Islander seen and the first one to meet Frisk, though Frisk was unconscious. She appears to be a seven or maybe small nine year old Caucasian girl. She appears everywhere and sometimes in rather impressive places such as on top of massively tall trees of mountains. She seems friendly to Frisk and is somewhat respected and known by the higher-ups of Serphile Island. Vice-President of the Star Club. She seems to be depressed deep down with something about Luna. She gives random cryptic warnings about the island holding something darker. During the genocide route, Frisk kills her after she tries to change their view. She is later seen as a "ghost" on her secret hidden dock. During the Silence Route, all the secret fights must be completed and all Lunastones collected to get to Ira's Dock. There, if Frisk dares approach Ira, she'll reveal that she is in fact perfectly alive. She drops her facade and reveals a brutal insane uncaring being who has killed more than any God has ever. Her name means Destroyer and that is what she is known by. The Island's Heart. The Second Hive Queen. The Destroyer. The hardest fight which ends with either Frisk dying and the island resetting or Frisk winning and dying and killing everything, forcing a reset. In her six phase fight, Ira reveals that this island was made out of a truce between her kind and a couple of powerful Gods. She also reveals that Luna is a person that everyone in the Star Club was in love with. They disappeared and she and Devil made a promise with Luna to try and be good. The entire reason why Ira didn't torture Frisk to death was because she was promised not to attack anyone unless they attack first, a promise taken literally. Despite all her efforts to try and make sure she breaks none of Luna's promises, Ira decides she'd rather see her again than not see her at all and breaks her promise, pulling out all the stops of her weakened state just to kill Frisk and the being supporting them. Like Della, Dummy, Iris, Gaster, Chara, and Mary, she wasn't infected and could not spread the parasites despite her being the second hive queen. During Devil's fight, she says that Frisk will destroy everything she fought to protect and more if she continues her path. Those words were talking about Destroyer, who breaks a promise which means everything to her just to see her loved one again, destroying everything in the process. Without any hesitation, she calls Frisk a she, no matter what anyone says.

#### Della Luna Devil

Della is seen as a shop keeper selling ice cream in the cold. She is a comedic relief but can be scarier than Sans. Despite looking human and not being infected or mutated, Della is not a human. In fact, no one but Gaster and the Star Club members know what she is. Despite her being cryptic, she is not fightable unless the Silence Route is activated, in which she is an extremely secret fight. The fifth secret fight. Her name means Devil in her language and, as such, she is an actual Devil. Known as Devil by Gods, or so she says. She is the second hardest fight and has four phases. She reveals during her fight that she doesn't care much for anything that happens here other than to her fellow members of the Star Club. She chastises Frisk for killing people who aren't infected and reveals that if her fight was to keep going on, countless humans will die. During her final phase, she tells Frisk that if she were to continue going down this path, she would lose everything that she fought for and more. She also reveals that Frisk is being helped by another of their kind as, otherwise, Frisk wouldn't be able to harm them, let alone fight them. Despite being The Devil, she guides souls to reincarnation. Unhesitatingly calls Frisk a she no matter what anyone says.

#### Irene Birdshop

Irene Birdshop is a wild kid who hangs out with Ira, Della, Dummy, and Chara. She was born and raised herself in the woods fighting the hoard of husks. Because of this, she is like an animal. She doesn't trust Frisk and will attack them if they go into her lair but can be quickly calmed down. She is the first secret fight and isn't infected. She can be totally ignored and it won't affect anything other than Frisk's relationship with the Star Club. Irene is also a part of the Star Club. Unlike the others, she isn't brought back to life by the parasites. It was said she made a promise to someone to stop them from bringing her back. Can be befriended with enough patience. Although she rarely talks, she unhesitatingly calls Frisk a she even if someone says otherwise.

#### Valcien

Valcien is a self-proclaimed villain. She runs a organization that is dedicated to stealing from the rich and giving it to the poor...as well as to kill any outsiders. For reasons unknown, she has a deep hatred for outsiders and once she hears from Frisk, she contacts Fsex to try and deal with them. Despite using her soldiers to fight, Valcien is no stranger to fighting. She is actually quite tough. Has a crush on Fsex and despite being a villain, she is friends with the king. Recognizes Frisk as a 'he'. A 'mad' scientist.

#### Fsex

Fsex's name is a pun on F-6. If her name isn't a red flag on her powers, then her appearance is. A mix between a red and black jet and a human, Fsex's origins are unknown. She lives on Sky-Reach's mountain, which is right next to Elsa's Mountain. She is bipolar and is quick to get panic attacks. She suffers from PTSD though doesn't say what it is about. Her house is in a scrapyard of jets, warships, and tanks, all of which she can control. She is known as the one-man army due to the firepower at her fingertips and is close friends with Hellin, Sans, Tulip and her sisters, and Macy. She has a crush on Velcien. Recognizes Frisk as a 'she' and is a part of the Star Club, though she doesn't talk about it. In the Silence Route, once Ira gets "killed", she uses her jets to bomb the entrance to Ira's Dock. Isn't a fight in the Extermination or Silence Route even if Velcien is killed. The reason why she doesn't fight Frisk in those routes is unknown.

## Locations

### Treehouse

A giant treehouse on a giant tree. It has many rooms with some defying physics. The Treehouse also holds a secret hospital/laboratory for patients who have been so heavily damaged that the only thing keeping them alive and going are the parasites inside them. It is the custom made home of Macy and.... someone else.

### Common Beach

A beach that, despite its size, does not receive a lot of attention. Most of the people there tend to be washed-up bodies of animals or dead outsiders. There is an abundance of shipwrecks under the water near the shore making it a popular spot for treasure hunters. Those treasure hunters normally have some kind of mutation or magic that allows them to breath underwater and normal plain old humans without any magical help are either going to be ripped apart by the sharp rocks underneath the wave by the many sharp currents, or be infected and turn into a husk by some of the parasitic growths hiding there.

### Ira's Dock

A hidden place, it is first seen in the prologue where Frisk washed up, the title image, and after Frisk leaves the Treehouse. In order to access it, Frisk has to be on Common Road and find a secret path through the bushes. It can be accessed later on with its main entrance being in a cove in between Elsa's Mountain and Ellibissia. It is a pretty beach with a beautiful view of the sun setting and rising as well as the ocean and island. It is also the place where Ira hangs out the most. Throughout the story, if you keep going back, characters of the Star Club can be seen at the beach. It is also the place where Ira fights Frisk. Despite its looks, the beach and dock hold up for almost the entire fight, meaning the place itself is weird. It is an important memorial but what it is a memorial for is never mentioned.

### Common Path

A nice path with lots of pretty views. Though near the end of the path, there is a large forest full of tribal people. Its a safe place...if your infected or have magic that is. If not, you can expect to be attacked by animals and the tribal people. Luckily, the animals are relatively weak. There are two secret paths on the path, one leading to Ira's Dock and the other leading to Necktor's Woods, a place where even the Islanders avoid.

### Elibissia

A large town facing a beach with its back to a massive mountain face. It is relatively the safest place on Serphile Island. That is if you mention that a lot of the population there is even more insane than the normal populace and the powerful and influential people living in or nearby the town. Unfortunately, the caves surrounding the town are less than friendly and the town next to it is in the middle of a crisis, meaning Elibissia is currently isolated. They are known for their love of fish. The town seems to hold something called Luna in high regard. A lot of tribal people live nearby the town in the woods.

### Mally's Cave

This tunnel system is large and covers most of Elibissia, Elsa's Mountain, Sky-Reach Mountain, and Sandy Forest. The actual main entrance to the cave system are located at the back of Elibissia and in Snowy-Side. A large infestations of large mole rat-like husks and rabid new husk creatures currently inhabit the cave system, attacking even the Islanders, though not killing them. Because of this, exploration is ill-advised. It used to be used as a way to get from place to place quickly and some rumors say that it even use to lead to the capital. Whatever the reason was in the past, the tunnels were used by only the brave. Now, they are used by the local soldiers to contain the dangerous husks.

### Elber's Ridge

Elber's Ridge is located on the top of the cliff at the back of Elibissia. It is actually much larger than one would expect, stretching from Common Path to The Treehouse as well as Necktor's Woods and Necktor Town before ending at Salashor Town. If one were to take a small cave system, it would lead them to Elber's Forest. Despite being a plain on top, half of the ground is stone.

### Tribal Woods

Called that by the locals, most of the tribal Islanders can be found there. A cheery place as long as your not an Outsider...and especially if you are an outsider and not infected. It is actually a pretty small forest but the trees are thick and close together and visibility is low, making the forest a somewhat scary place.

### Elsa's Mountain

A large mountain covering most of the West Side of the island. For some strange reason, to the left of the mountain is covered in snow and sometimes is even snowing. It is also the hiding place of Valcien and her crew. The wildlife is particularly dangerous near the north of the mountain where the mountain comes down to Seeker's Woods, a heavily infected forest.

### Sandy Forest

A forest with an abundance of quicksand. It used to be a safe place. That changed ever since a lot of the Islanders were eaten by a giant worm husk. The route through the forest is mostly destroyed and the wildlife is deadly. There is also an abundance of husks.

### Sandstone Village

This village is partly destroyed and most of the children there have been eaten by a giant worm husk. This town used to be a nice place with the populace being energetic and relatively fine towards outsiders. They are in desperate need of help. if Frisk helps the town with their giant worm problem, they'll be forever grateful, get in Asgore's good list, and gain a map of the island's wild parts. Strewn around the village are torn body parts and blood splatters. A ghost village of sorts.

### Snowy Cap

Located to the west of Elsa's Mountain, this hilly place is covered in snow. It snows quite often and many of the locals are friendly. Unfortunately, that is also where quite a few members of the military lay so it isn't a safe place for Frisk. This is where Della can be mainly found.

## Gallery

First logo of Island Fall - Created by Western42