BONELAB Fusion Killer Mode

Killer Mode is an experimental asymmetric horror gamemode for BONELAB Fusion. One player becomes the Killer while the other players hide, survive the timer, or escape through a configured exit.

Requirements

BONELAB on PC
MelonLoader 0.6.x
Fusion 1.14.2
BoneLib 3.2.2
The same Killer Mode version installed by every player

Thunderstore Mod Manager or r2modman installs the required Fusion and BoneLib packages automatically.

Features

Host-authoritative Killer, Survivor, and Spectator roles
Escape and Survival modes
Saved per-map lobby, Killer, Survivor, Spectator, door, and escape locations
Host-only round settings and safe start/pause/resume controls
Custom Killer avatar and right-hand equipment selection
Safe PolyBlank fallback when a selected Killer avatar is unavailable
Starting inventory cleanup and automatic round-item cleanup
One configured flashlight per Survivor
Configurable health, movement, darkness, and fog
Countdown, round, Last Survivor, and looping heartbeat sounds
Last Survivor reveal visible only to the Killer
Private spectator voice group
Custom-map SDK components and in-game map setup tools

Flashbangs are temporarily disabled in multiplayer while they are being tested.

Quick Start

Install this package with Thunderstore Mod Manager or r2modman.
Make sure every player has the same version installed.
Start a Fusion lobby and load a playable level.
Open Fusion's Gamemodes page and select Killer Mode.
The host configures the round and places custom-map locations if needed.
Press Start Round Now, or allow Fusion's automatic countdown to start it.

Manual Installation

Copy BONELABFusionKillerMode.dll from the package's Mods folder into your BONELAB Mods folder. Install Fusion and BoneLib separately.

Do not install the Solo Test DLL together with the multiplayer DLL.

Custom-Map Setup

Open Killer Mode > In-Game Map Setup, press Begin Setup / Pause Auto-Start, walk to each location, and place:

White: pre-round lobby
Red: Killer spawn
Cyan: Survivor spawns
Gray: Spectator area
Brown door and green area: Escape objective

Press Finish Setup / Allow Round Start when finished. Layouts save separately for each map and remain saved after closing BONELAB.

Optional Content

Third-party weapon, flashlight, and avatar packs are separate downloads. Killer Mode only stores their public barcodes and does not redistribute their files.

Custom downloaded Killer avatars must be available through Fusion downloading or installed manually. If one is unavailable, the Killer safely uses PolyBlank for that round.

Alpha Notice

This is an alpha release. Multiplayer synchronization, custom-map effects, custom avatars, and certain map-specific lighting features may still require fixes.

Development used AI-assisted coding and human-directed testing. Please report issues with the latest MelonLoader log and the Killer Mode version number.

Credits and License

Created by the Fusion Killer Mode Team. Audio credits are included in AUDIO_CREDITS.md. Released under the MIT License.