COTLMP 8 Player Expansion

Experimental local co-op expansion for up to 8 players in Cult of the Lamb.

This is local multiplayer only. Online multiplayer is not included.

Main features

• Up to eight local players with separate controllers.
• Player 3-8 number markers, coloured halos and expanded HUD support.
• Dynamic cooperative camera designed to keep the full group visible.
• Camera stays cooperative during normal NPC dialogue instead of being stolen by the speaker.
• Scalable enemy quantity and health balance for larger groups.
• 8P DIFFICULTY selector in the pause menu: Easy / Normal / Hard / Extreme.
• Independent follower conversations and compact personal menus.
• Multiple players can collect, mine, chop and build simultaneously.
• Per-player tarot card selection.
• Democratic door/building entry voting with RT / Heavy Attack to toggle DENY.
• Players entering a voted door disappear from the current room until the vote resolves.
• Weapon/curse recovery when a player cannot collect an assigned item.
• Temple/dialogue recovery and F10 emergency cleanup for stuck interactions.
• Transition cleanup closes leftover personal menus and overlays before the next room loads.
• Low-health warning is only emitted when more than 51% of active players are actually low.

8-player balance

Enemy count and health use separate scaling so larger groups do not simply create extreme damage-sponge enemies.

The default NORMAL enemy-count target is approximately:

• 5 players: x2 enemies
• 8 players: x3 enemies

Bosses remain single entities so their phases are not duplicated.

The pause-menu selector changes enemy quantity, while health scaling remains handled separately.

Controls

• Use the normal pause-menu Add Player option to connect additional players.
• During a room/building entry vote, use RT / Heavy Attack to toggle DENY.
• DENY only wins when deny votes are strictly greater than the number of players already inside.
• After a denied transition, only the initiator receives the 15-second re-entry cooldown.
• Press F10 to force-close a stuck menu/conversation and restore player control.

Installation

Thunderstore Mod Manager / r2modman

Install this package normally and launch the game through the manager.

Manual installation

1. Install BepInEx and COTL API.
2. Close Cult of the Lamb.
3. Copy this package's BepInEx folder into the Cult of the Lamb game folder.
4. Allow Windows to merge folders.
5. Remove older duplicate COTLMP DLLs from other BepInEx/plugins subfolders.
6. Start the game.

If something fails, check BepInEx/LogOutput.log.

Experimental warning

Cult of the Lamb was designed around two-player co-op. This expansion patches many systems that assume only two players, so rare tutorials, cinematics, unusual menus or future game updates can still expose edge cases.

When reporting a bug, include:

• BepInEx/LogOutput.log
• number of active players
• selected 8P DIFFICULTY
• room, NPC or menu involved
• screenshot/video for visual problems

Credits

Based on COTLMP - Multiplayer Expansion by CobbleCorn.

This package is an experimental, non-commercial community modification. Cult of the Lamb and its assets belong to Massive Monster and Devolver Digital.

Changelog

2.34.0 - TEST 8.17

Camera and dialogue

• Normal non-cinematic NPC text now preserves the full cooperative camera.
• NPC dialogue zoom requests are ignored while those short texts are open.
• Camera distance is based on the real separation of active players.

Transition and menu cleanup

• Starting a transition now closes registered personal menus such as cooking, food selection, follower orders and minigames.
• Transition cleanup releases the menu owner's input and removes personal-conversation state before the next room loads.
• Non-standard overlays are also disabled so old UI cannot survive into the next scene.

Co-op reliability carried forward

• Equipment podium clones preserve the real room-generated item level.
• Dungeon camera cleanup removes stale dialogue/encounter focus targets.
• Low-health warning only plays when more than 51% of active players are low, using one emitter.
• Missing normal weapons and curses can be recovered automatically after 20 seconds.
• Compact transparent personal menus and larger food text.
• Per-player tarot choices.
• Democratic room/building transition voting.
• Temple and dialogue softlock recovery.
• Dynamic 8-player camera, expanded HUD and coloured player markers.
• 8P difficulty selector with independent enemy-count scaling.