4Lethal Soundpack

v9.10.1·Updated 2026-05-17

A Soundpack dedicated to the Lethal Brain Rot Crew

About this mod Author’s original text

4Lethal Soundpack!

This mod changes the sounds in the game! I crafted this soundpack with my friend group in mind, and now I'm sharing it to make updating the soundpack a breeze for all of us. In this soundpack, you'll discover a collection of memes, nods to video games and other media, and personal creations that will truly immerse you in the Lethal Company experience!

I did not design any of the sounds in this soundpack to be scary or frightening, but some may find a few sounds loud, sudden, and/or disturbing.

This soundpack is a labor of love, strictly non-profit, and designed to enhance your gaming experience. While it was initially intended for use within my friend group, I'm more than happy for you to enjoy it as you see fit.

Changelog

9.10.1 | Pre-10.0.0 Update Part 2!

  • Overhaul

9.10.0 | Pre-10.0.0 Update!

  • Added a phone sound.
  • Included a Luigi voice line when pushing the ship lever.
  • Added a subtle audio swap for the bell when it jiggles.
  • Overlayed a Chain Chomp sound effect over one of the new monsters.
  • Changed the intro speaker speech to a preview of a brand new intro.
  • Changed the teleporter sound (this one is in beta).
  • Reverted the fire alarm sound change from 9.5.0 (lemme cook on that one).

9.5.0

  • Gave more voice lines to the tiny man when the player kicks his rock.
  • Added an alarm sound in the facility that may or may not provide lore.
  • Gave Mimics 30,000 V•Bucks to purchase all Fortnite emotes.
  • Spiders can now catch feelings with their webs.

9.4.0

  • Gave the Bunny Suit some love.
  • Added another Mario jump sound.
  • Changed the sound the bottles make when the player drops them.
  • Made the game backwards compatible with the Sega Genesis.
  • Coil Heads were given at least one butthole, but they can spawn with more.

9.3.1

  • Added a Mario jump sound.
  • Dr. [B]epper

9.3.0

  • Changed the murder theme that plays when the Butler... well, tries to murder the player.
  • Enhanced the sound made when a Nutcracker spots a player.
  • Changed the sounds that the Tulip Snakes make to sound like a particular (debatably evil) mad scientist.
  • Enhanced the jetpack flight sound by mixing it with a song.
  • Thumpers' nuts are now made of titanium.
  • Nutcrackers are envious of the Thumpers' titanium nuts.
  • Removed any references of Jeb from the Epstein Files.

9.2.0

  • Added a few new sounds for the Baboon Hawk.
  • The Company denies any allegations of interfering or influencing the 2532 New Donk City Mayoral Election. We at The Company offer a warm, neutral congratulations to Beeg Banana Peel for winning with a ratio of 99 to 1.

9.1.1

  • Updated a scan sound to something else to remove duplicate instances.
  • Added a water slide to the factory interior for Yippee bugs to use while the employees loot the joint.

9.1.0

  • Added a voice line to supplement the jingle played when there's a sale.
  • Added a menu theme.
  • Added a new phone sound.
  • Changed the jingle when the player brings scrap onto the ship.
  • Made failing to plug in a USB A cable into the computer on the ship within two attempts punishable by death.
  • Added a detox station for employees that hit too much of that Za.

9.0.3

  • Changed the laughs and cries of the mask items.
  • Automatically declined a company-wide invitation to a Diddy party.

9.0.2

  • Overhauled the menu music by removing the least popular tracks and adding a few new ones.
  • Overhauled the boombox to make it play New Super Mario Bros. DS tracks.
  • Reduced the volume of the Giant Sapsucker's screams.
  • Bah bah!

9.0.1

  • Made a change to the Baby Sapsucker's cry when it's kidnapped.
  • Changed the sound the Baby Sapsucker makes when it initially hatches.
  • Changed the screams the Giant Sapsucker makes when the player aggros it.

9.0.0

  • Made it so that if the lights flicker, the sound is a bit shorter.
  • Changed the sounds that the Baby Sapsucker makes when it screams as its kidnapped by the player.
  • Added a new menu theme.
  • Added a new hand-made sound to the phone.
  • Changed the sound ma

Install & use Install: BepInEx plugin

  1. The archive from playbuff is the mod itself — usually a BepInEx plugin (a .dll or a plugin folder once unzipped).
  2. Recommended: use a community mod manager (such as r2modman) — pick this game, import the mod, and the manager sets up BepInEx and its dependencies for you.
  3. Manual route: install the BepInEx loader in the game folder, then drop the unzipped .dll or plugin folder into BepInEx/plugins/.
  4. Launch the game — the BepInEx console logs every plugin it loads; seeing this mod in the log means it is installed.

Mods with listed dependencies need those installed too, or they will not load. Options are usually changed in-game or in the plugin's config file.

Dependencies

Install these first, or the mod will not work:

BepInEx-BepInExPackloaforc-loaforcsSoundAPI

File & checksum

Filename
4Lethal_Soundpack-9.10.1.zip
File size
60.1 MiB