Killable Fish

Description

Killable Fish is a lightweight Subnautica 2 mod that lets marine life be damaged and killed using existing in-game tools.

This is not meant to turn Subnautica 2 into a full combat overhaul. The goal is simple: if a creature can attack you, you should have some basic way to defend yourself using tools that already exist in the game.

This is my first mod, so the scope is intentionally small and focused. Co-op is unsupported and being worked on currently.

Main Features

Existing tools can damage fish.

Fish can play death reactions or death animations.

Lightweight behavior change, not a weapon overhaul.

Designed to feel simple, intuitive, and natural during normal gameplay.

As it stands, fish will respawn after leaving the area and returning. For now this is intended and may evolve over time to an extended respawn time frame as the mod matures.

Damage Values

The Survival Tool hit deals 25 damage.

The Sonic Resonator blast deals 125 damage.

The Sonic Resonator V2 ranged bubble explosion deals 250 damage.

Requirements

UE4SS for Subnautica 2

Installation

Vortex / Mod Manager (Recommended) 

1. Install Vortex Mod Manager

2. Install this mod by clicking in order: "Mod Manager Download" , "Download" , "Slow Download" (or fast for premium users)

3. Once installed click "Deploy Mods" button.

4. Launch through Vortex or Steam.

Windows / Steam

1. Install UE4SS for Subnautica 2 first and follow its installation steps.

2. Download and extract KillableFish-0.6.0-beta-public.zip.

3. In Steam, right-click Subnautica 2 > Manage > Browse local files.

4. From the folder that opens, go to:

  Subnautica2 Binaries Win64 ue4ss Mods

5. Drop the KillableFish folder into Mods.

6. Open:

  Subnautica2 Binaries Win64 ue4ss Mods mods.txt

7. Add or confirm this line:

  KillableFish : 1

8. Fully restart the game.

Final folder layout should look like:

steam steamapps common Subnautica2 Subnautica2 Binaries Win64 ue4ss Mods KillableFish enabled.txt

steam steamapps common Subnautica2 Subnautica2 Binaries Win64 ue4ss Mods KillableFish Scripts config.lua

steam steamapps common Subnautica2 Subnautica2 Binaries Win64 ue4ss Mods KillableFish Scripts main.lua

steam steamapps common Subnautica2 Subnautica2 Binaries Win64 ue4ss Mods KillableFish Scripts shot.lua

You do not need to start a new save.

To confirm the mod loaded, open:

Subnautica2 Binaries Win64 ue4ss UE4SS.log

Search for:

[KillableFish]

If the mod loaded, you should see lines like “Loaded version ...” and hook registration messages.

Xbox / Game Pass

Game Pass paths differ and are not fully tested. If using a Game Pass build, install UE4SS for that version first, then place KillableFish in the Game Pass UE4SS Mods folder, usually near:

Content Subnautica2 Binaries WinGDK ue4ss Mods

Also confirm KillableFish is enabled in that install’s mods.txt:

KillableFish : 1

Linux / Steam Deck

Linux is untested by me. UE4SS users may need Steam launch options such as:

WINEDLLOVERRIDES="dwmapi=n,b" %command%

Compatibility

Do not run this together with other fish/fauna killing or combat-overhaul mods unless you are testing conflicts. If the mod does not work, test with only UE4SS and KillableFish installed first.

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Known Issues

- Co-op is unsupported first priority currently.

- FourEye is currently unsupported. Will address in future updates.

- Early Access updates may break the mod.

Notes

This mod does not add new weapons, new combat systems, or major gameplay changes. It only gives existing tools damage behavior against fish and allows fish to react accordingly.

Links and Love

Thanks to Unknown Worlds for making Subnautica 2. I loved the first Subnautica, and this sequel encouraged me to try making my first mod.

All Subnautica-related IP belongs to Unknown Worlds. I am not selling anything related to this mod or the game.

My website:

https://3dendeavors.com

Support my projects:

https://buymeacoffee.com/3DEndeavors

Support is appreciated but completely optional. This mod is free, and donations are never required for downloads, updates, support, permissions, or feature requests.