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subnautica-ii-coop-mod

Set up and synchronize Subnautica 2 co-op multiplayer with BepInEx.

4|Updated May 16, 2026
Search Tags:#troubleshooting#multiplayer#bepinex#subnautica 2#co-op networking#game synchronization#config automation
One-click install
npx skills add https://github.com/Aradotso/devtools-skills --skill subnautica-ii-coop-mod
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: subnautica-ii-coop-mod
Source: https://github.com/Aradotso/devtools-skills/tree/main/skills/subnautica-ii-coop-mod
Command: npx skills add https://github.com/Aradotso/devtools-skills --skill subnautica-ii-coop-mod

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It solves the challenge of setting up and keeping Subnautica 2 multiplayer gameplay synchronized across players using a BepInEx-based co-op mod, including installation, session setup, and common sync troubleshooting.

Core Features & Use Cases

  • Deterministic state synchronization: Keeps gameplay state aligned across clients so actions (like inventory/world updates) don’t drift.
  • Adaptive difficulty scaling: Adjusts difficulty to match group size and gameplay conditions.
  • Decentralized peer-to-peer networking: Enables co-op without requiring a central server, using NAT punch-through and sync interval controls.
  • Shared gameplay options: Supports shared blueprints, shared map pings, and time-of-day synchronization.
  • Optional AI narration/lore integration: Hooks into OpenAI/Claude flows for narration and creature lore during co-op.

Quick Start

Install BepInEx 6.0.x, copy the Deep Synergy plugin files into Subnautica 2’s BepInEx/plugins directory, create the required config file at BepInEx/config/synergy_profile.json, then start the host session with /start_server and share the session code with your friends to join using /join_session <session-code>.

Frequently Asked Questions about subnautica-ii-coop-mod

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up Subnautica 2 co-op multiplayer using BepInEx?▼

To set up Subnautica 2 co-op multiplayer, install BepInEx 6.0.x, copy the Deep Synergy plugin into the plugins directory, create the synergy_profile.json config file, and use in-game console commands to start and join sessions.

Why does my Subnautica 2 multiplayer session keep desyncing?▼

Subnautica 2 multiplayer desync issues occur when gameplay state drifts across clients; this Skill troubleshoots common desync and connection problems by applying deterministic state synchronization and configuring sync interval controls.

Does Subnautica 2 cooperative multiplayer require a dedicated server?▼

Subnautica 2 cooperative multiplayer does not require a dedicated server, as it uses decentralized peer-to-peer networking with NAT punch-through to connect players directly without central infrastructure.

Can I sync shared blueprints and map pings in Subnautica 2 multiplayer?▼

You can sync shared blueprints, map pings, and time-of-day in Subnautica 2 multiplayer by configuring the shared gameplay options available within the synergy_profile.json file.

Do I need a specific BepInEx version for the Subnautica 2 co-op mod?▼

You need BepInEx 6.0.x to run the Subnautica 2 co-op mod, as the plugin requires this specific version to properly hook into the game and execute the networking configuration.

What is adaptive difficulty scaling in Subnautica 2 multiplayer?▼

Adaptive difficulty scaling in Subnautica 2 multiplayer automatically adjusts gameplay challenges to match your current group size and gameplay conditions, ensuring balanced co-op sessions.

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