subnautica-ii-coop-multiplayer-mod

What problem does it solve?

It helps players set up and run a stable, synchronized cooperative multiplayer experience in Subnautica 2, including shared inventory and base building, without manually coordinating each player’s world state.

Core Features & Use Cases

• BepInEx IL2CPP Multiplayer Mod Setup: Install and configure a BepInEx-based plugin for Subnautica 2 using the expected folder layout and config profile.
• Deterministic Session Synchronization: Keep gameplay state aligned across peers with inventory synchronization, conflict resolution, and time-of-day synchronization modes.
• Optional AI Narration & Lore Hooks: Enable OpenAI/Claude-driven narration and logs using environment variables and API settings.
• Use Case: Playing with friends (2–8 players) to build a shared base while ensuring picks, inventory state, and difficulty scaling remain consistent.

Quick Start

Configure BepInEx IL2CPP on your Subnautica 2 install, place the DeepSynergy DLL into BepInEx/plugins, create BepInEx/config/synergy_profile.json, then host the session in-game using /start_server and share the generated session code with your friends.