subnautica-2-coop-mod-bepinex

Install BepInEx 6.0.x for Unity IL2CPP games into the Subnautica 2 game directory, then extract the Deep Synergy mod DLLs into BepInEx/plugins. Launch the game and check the BepInEx console for the mod loaded message to verify installation.

The host runs /start_server in the BepInEx console to generate a session code in the format XXXX-XXXX-XXXX. Other players join with /join_session followed by that code, then wait for world state, inventory, and base structure synchronization to complete.

Yes, when collaborative_placement is enabled in synergy_profile.json, base components placed by one player appear in real time for all connected players. Power generation and resource consumption are shared across the session.

Desync occurs when the Merkle tree inventory hashes differ between peers, often from packet loss or latency. Run /sync_health to diagnose, then /force_resync inventory to reconcile, or restore from a session backup if the issue persists.

The mod automatically migrates the session by electing a new host and restoring state from the most recent backup. Players continue without interruption, and all progress, bases, and inventory are preserved when enable_migration is true.

Common causes are missing plugin DLLs, an incompatible BepInEx version, broken IL2CPP hooks after a game update, or conflicts with other mods. Check BepInEx/LogOutput.log for the specific error and verify you are running BepInEx 6.0.x.