LethalOptimizer v1.3.3

Performance optimization mod for Lethal Company on low-end PCs.

⚠️ Warning: On powerful hardware the effect may be minimal or unnoticeable. This mod is designed for weak devices. ️⚠️ Warning: I don't have the opportunity to test the modification in detail, so there may be errors.

⚠️ To report errors: https://discord.gg/pATupFuJ42

What's New in v1.3.0

Added:

• Distance Optimization — enemies far from players update less frequently (up to 40% load reduction)
• NavMesh Cache — pathfinding path caching (up to 20% CPU reduction)
• Particle Optimization — reduced particle count and emission rates
• Individual settings for each of 18 enemies in config
• Individual settings for each trap in config

Fixed:

• Eyeless Dog bug — dog wasn't reacting to sounds other than footsteps
• All AI patches rewritten with correct timers
• Added null-checks to all patches for stability
• Each enemy now has its own independent timer

Features

AI Optimizations (18 enemies)

• Reduced AI update frequency when enemies are far from players
• NavMesh path caching to reduce pathfinding calculations
• Line-of-Sight check throttling
• Skipping updates for dead enemies

Supported enemies:

• Jester, Thumper, Coil-Head, Baboon Hawk, Bracken
• Ghost Girl, Hoarding Bug, Spore Lizard, Forest Giant, Nutcracker
• Eyeless Dog, Bunker Spider, Masked, Hygrodere
• Old Bird, Butler, Tulip Snake, Maneater

Trap Optimizations

• Turret — reduced raycast check frequency
• Landmine — component caching
• Spike Trap — entrance caching

Graphics Optimizations

• Low-End Mode — reduced shadow, texture, LOD quality
• Particle Optimization — reduced particle count

Other

• AI node caching
• Network sync optimization
• UI update optimization

Installation

Install via mod manager or copy DLL to BepInEx/plugins/

Configuration

All optimizations can be toggled in config: BepInEx/config/com.lethal.optimizer.cfg

Config sections:

• 1. General — general settings
• 2. AI General — Distance Optimization, NavMesh Cache
• 3. AI Enemies — individual settings for each enemy
• 4. Traps — settings for each trap
• 5. Graphics — Low-End Mode, particles
• 6. Network — network optimizations
• 7. Player — player optimizations
• 8. Other — objects and UI

Compatibility

• Lethal Company v50+
• BepInEx 5.4.x
• Compatible with most mods