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Hello everyone!

We're developing Underpest: No Mercy, a post-apocalyptic Undertale fangame, and we're looking for more people to join the team—especially programmers.

Current Team

•  3 Artists
•  1 Programmer (we're especially looking for more programmers)

About the Game

In this universe, mysterious red flowers have spread throughout the Underground, infecting monsters and transforming them into violent, ravenous creatures. There is no MERCY option—once a monster is infected, there is no way to save them. Survival is the only choice.

The story follows Frisk and Flowey as they search for the six human souls in hopes of escaping the Underground while encountering survivors and uncovering the fate of a world that lost hope decades ago.

We're Looking For

•  Programmers (Priority)
• Pixel Artists (Sprites and Backgrounds)

This is a volunteer, unpaid fangame created by fans for fans. We are not making this project for profit—we simply want to create a memorable experience for the Undertale community.

If you're interested or have any questions, feel free to send me a message!

Game Jolt: https://gamejolt.com/games/underpestnomercy/1068655

credits to Polina

Discord: super_soneco12

Hello everyone! We are creating an AU called *Underpest: No Mercy*, a fangame based on an Undertale AU (Alternate Universe).

Context: In this world, red Echo Flowers have spread throughout the Underground, infecting monsters and turning them into violent, voracious, zombie-like creatures. Here, there is no option to spare—the only way to survive is to fight. Even on the "Pacifist" route, survival requires fighting the infected.

The story follows Frisk and Flowey as they attempt to collect the six human souls to escape the Underground, encountering survivors and what remains of this world.

We are looking for pixel artists for sprites, backgrounds, character design, logos, and animation.

This is a fangame—a voluntary, unpaid project made by fans for fans.

Credits: Polina, Litwa, Gb

If you are interested, please send me a DM or contact me via Discord (super_soneco12).

Hello everyone! We have just started development on *Underpest: No Mercy*, a fangame based on an *Undertale* AU (Alternate Universe).

Context: In this world, red Echo Flowers have spread throughout the Underground, infecting monsters and turning them into violent, ravenous, zombie-like creatures. Here, there is no option to spare—the only way to survive is to fight. Even on the "Pacifist" route, survival means fighting the infected.

The story follows Frisk and Flowey as they attempt to collect the six human souls to escape the Underground, encountering survivors and what remains of this world.

We are looking for pixel artists for:

- Sprites

- Backgrounds

- Character design

- Logos

- Animation

This is a fangame—a voluntary, unpaid project made by fans, for fans.

First piece of art by: Levchenko Polina  

Second piece of art by: letwik  

If you are interested, please send me a DM or contact me on Discord: *super_soneco12*

Hello everyone!  

We’ve just started development on Underpest: No Mercy, and we’re currently looking for pixel artists to help with sprites and scenery.  

This is an Undertale fangame, so it’s a voluntary and unpaid collaboration — made by fans, for fans.  

Context of the AU: In this world, red echo flowers spread throughout the Underground, infecting monsters and transforming them into violent, hungry, zombie‑like creatures. Here, there’s no sparing the infected — they’re already gone. The only way to survive is to fight.  

If you’re interested in joining the project, please reach out to me on:  

My Discord: super_soneco12

Art by: [Polina Levchenko]  

Gamejolt: https://gamejolt.com/games/underpestnomercy/1068655

Hello! I'm working on an Undertale fangame called Underpest No Mercy, an AU set in a post-apocalyptic version of Undertale. In this world, red echo flowers spread throughout the Underground, infecting monsters and transforming them into violent, hungry, zombie-like creatures. Here, there's no sparing the infected already gone, and the only way to survive is to fight. The story follows Frisk and Flowey as they travel through the Underground, exploring this world, encountering survivors and infected, aiming to reach the castle, collect the six human souls, and escape the Underground. This is a fangame project made by fans, for fans. It's a voluntary and unpaid collaboration. We are currently looking for programmers familiar with GameMaker to help bring this project to life. If you are interested, my Discord is:

super_soneco12

Art by: [Polina Levchenko ]

Gamejolt:https://gamejolt.com/games/underpestnomercy/1068655

Yes

Hello! I'm super_soneco12 and I'm looking for collaborators for an Undertale fangame/AU!

About the Project

Underpest: No Mercy is a post-apocalyptic Undertale fangame. Strange echoing red flowers begin to spread throughout the Underground, transforming monsters into violent and irrational creatures like zombies. Years later, Frisk falls into a completely destroyed and infected world.

The story follows Frisk and Flowey in their search for the 6 human SOULS to escape, while discovering what happened to this devastated world. Unlike the original Undertale, mercy is no longer an option; the infected have disappeared and there is no way to save them. The only way to survive is to fight.

Project Focus

- Fan-made game with a focus on story

- Survival/horror atmosphere

Open Positions

- Pixel Art Artists— characters, environments, infected monsters

- GameMaker Programmers — gameplay, mechanics, systems

- Concept Artists— character and logo design

This is a volunteer, unpaid, fan-made project.

Links

GameJolt: https://gamejolt.com/games/underpestnomercy/1068655

Art by: Polina Levchenko

My Discord: super_soneco12

If you are interested, please contact me via DM!

I sent you a request on Discord.

UNDERPEST: NO MERCY 🌺

Underpest: No Mercy is a post-apocalyptic Undertale fangame/AU.

Story Context

Many years after the war between humans and monsters, strange echoing red flowers begin to spread throughout the Underground. At first, they seem harmless, but soon they spread uncontrollably, and monsters who come into contact with them become violent, aggressive, and lose all reason.

As the infection spreads, the Underground descends into chaos. Years later, Frisk falls into a completely destroyed and infected world beneath the surface.

The story follows Frisk and Flowey as they journey through this ruined world in search of the 6 human SOULS to escape the Underground, while discovering what happened to this fallen world.

Unlike the original Undertale, this world no longer offers the option of mercy. The infected monsters are long gone, and the only way to survive is to fight. Initial Development

🌺 Story-focused Fangame

🌺 Horror/Survival Atmosphere

We are looking for pixel artists and GameMaker programmers

interested in this project. There is no remuneration; it is a fan-made project.

Art by Polina Levchenko 🌺

Discord: super_soneco12

Gamejolt:https://gamejolt.com/games/underpestnomercy/1068655

Hello! 🌺

I’m creating an Undertale AU/fangame called Underpest: No Mercy.

(This is a volunteer fan project with no payment — made out of passion and for fun.)

Note: This image is only concept art and does not represent the final game.

 Story Concept:

In this universe, red echoing flowers begin to spread across the Underground, infecting monsters and turning them into violent, starving, zombie-like creatures.

In this world, there is no option to spare — the infected are no longer themselves.

The only way to survive is to fight.

Story:

The story follows Frisk and Flowey as they try to collect the 6 human SOULs and escape a destroyed and infected Underground while exploring what remains of this world.

🌺 Looking for collaborators:

I’m currently looking for:

Programmers (especially GameMaker)

Pixel artists

If you’re interested in joining or want to know more, feel free to contact me:

My Discord: super_soneco12

 Concept art by (Polina Levchenko)

 Follow the project:

Game Jolt: (https://gamejolt.com/games/underpestnomercy/1068655)

Tumblr: (https://www.tumblr.com/supersoneco-121?source=share)

Hello everyone! 🌺

I’m creating an Undertale AU/fangame called Underpest: No Mercy.

This is an early-stage project (not a full game yet — currently concepts and ideas).

 This is a fan project (no payment — made for passion).

World / Setting:

In this universe, red echoing flowers spread across the Underground, infecting monsters and turning them into violent, starving, zombie-like creatures.

In this world, there is no option to spare — the only way to survive is to fight the infected.

Story:

The story follows Frisk and Flowey as they try to collect the 6 human SOULs and escape this destroyed world, while struggling to survive and explore what remains of the Underground.

Infected and Combat:

The infected have distorted voices and broken speech tied to their past memories.

Some newly infected monsters may still retain consciousness for a short time — they won’t attack immediately and may even ask for help.

It is possible to spare them, but this will have consequences, as they will eventually fully transform.

Environment:

Most areas are overrun by the flowers, which can block paths and make exploration more difficult.

During your journey, you can find or buy items that will help you in battles.

Collaboration:

I’m currently looking for collaborators — especially programmers (GameMaker) and artists — to help develop the project.

If you’re interested, my Discord is: super_soneco12

Follow the project:

Game Jolt: 

⁠https://gamejolt.com/c/underpestnomercy-mrr93r

Tumblr: https://www.tumblr.com/supersoneco-121?source=share

Concept art by Polina Levchenko

Hello! I’m creating an Undertale fangame/AU called Underpest: No Mercy, and I’m looking for collaborators to help turn this AU into a real game.

Concept: In this universe, red echo flowers have spread across the Underground, infecting monsters and turning them into violent, zombie-like creatures driven by hunger.

In this world, mercy no longer exists — infected monsters cannot be spared, and the only option is to fight them.

There are different types of infected monsters:

Recently infected monsters may still retain fragments of who they were. They may not attack and might ask for help. You can choose to spare them, but this may have consequences later.

Fully infected monsters have distorted, broken speech, representing fragmented memories caused by the infection.

During exploration, you’ll encounter different areas, including regions heavily covered by flowers that can block paths and force alternative routes. You’ll also be able to find or purchase items that help with survival and combat.

I’m currently looking for: – Programmers (GameMaker or Unity)

– Pixel artists

This is a volunteer/hobby project.

If you're interested or want to know more, feel free to DM me or contact me on Discord: [super_soneco12]

You can also check the project

 here: [https://gamejolt.com/c/underpestnomercy-mrr93r]

Hi, I’m creating an Undertale AU/fangame called Underpest: No Mercy and I’m looking for pixel artists and programmers to help bring this project to life. Here are some concept arts of the infected.

Context: Underpest: No Mercy is a post-apocalyptic Undertale universe where red echo flowers spread through the Underground, infecting monsters and turning them into violent, hungry zombie-like creatures. In this world there is no mercy option, because the infected are already gone and the only way to survive is by fighting and killing them. The infected also have distorted dialogue caused by the flowers, creating different types of infected monsters.

If you’re interested and want to know more or participate, my Discord link is [super_soneco12 ]

Game Jolt community: [https://gamejolt.com/c/underpestnomercy-mrr93r]

(This is a fan-made fangame with no payment, made for passion and fun.)

do you have Discord?

Hello! I’m creating an Undertale fangame/AU called Underpest: No Mercy, and I’m looking for collaborators to help turn this AU into a real game.

Concept: In this universe, red echo flowers have spread across the Underground, infecting monsters and turning them into violent, zombie-like creatures driven by hunger.

In this world, mercy no longer exists — infected monsters cannot be spared, and the only option is to fight them.

There are different types of infected monsters:

Recently infected monsters may still retain fragments of who they were. They may not attack and might ask for help. You can choose to spare them, but this may have consequences later.

Fully infected monsters have distorted, broken speech, representing fragmented memories caused by the infection.

During exploration, you’ll encounter different areas, including regions heavily covered by flowers that can block paths and force alternative routes. You’ll also be able to find or purchase items that help with survival and combat.

I’m currently looking for: – Programmers (GameMaker or Unity)

– Pixel artists

This is a volunteer/hobby project.

If you're interested or want to know more, feel free to DM me or contact me on Discord: [super_soneco12]

You can also check the project here: [https://gamejolt.com/c/underpestnomercy-mrr93r]

Hello! I’m creating an Undertale fangame/AU called Underpest: No Mercy, and I’m looking for collaborators to help turn this AU into a real game.

Concept: In this universe, red echo flowers have spread across the Underground, infecting monsters and turning them into violent, zombie-like creatures driven by hunger.

In this world, mercy no longer exists — infected monsters cannot be spared, and the only option is to fight them.

There are different types of infected monsters:

Recently infected monsters may still retain fragments of who they were. They may not attack and might ask for help. You can choose to spare them, but this may have consequences later.

Fully infected monsters have distorted, broken speech, representing fragmented memories caused by the infection.

During exploration, you’ll encounter different areas, including regions heavily covered by flowers that can block paths and force alternative routes. You’ll also be able to find or purchase items that help with survival and combat.

I’m currently looking for: – Programmers (GameMaker or Unity)

– Pixel artists

This is a volunteer/hobby project.

If you're interested or want to know more, feel free to DM me or contact me on Discord: [super_soneco12]

You can also check the project here: [https://gamejolt.com/c/underpestnomercy-mrr93r]