Nitrox is a free, open-source multiplayer modification for Subnautica that allows players to explore, survive, and build together in the game's underwater world. The mod introduces multiplayer functionality to the originally single-player survival game, enabling friends to connect through a client-server architecture and share the same environment. Nitrox synchronizes player movement, inventory interactions, world changes, and base construction so multiple players can collaborate on exploration and survival activities. The software supports shared underwater bases, furniture interactions, power management, and vehicle synchronization for the Seamoth, Prawn Suit, and Cyclops submarine. Players can communicate through an in-game chat system, view other players using dedicated HUD elements, and interact with synchronized objects throughout the game world. Developed as a community-driven project, Nitrox includes a dedicated launcher and continues to evolve with improvements to multiplayer.

Features

  • Subnautica Multiplayer Support: Play Subnautica with friends through a multiplayer modification that enables multiple players to explore and survive together in a shared underwater environment.
  • Client-Server Multiplayer Architecture: Connect players through multiplayer servers with synchronized player movement, shared world states, and long-distance world synchronization.
  • Collaborative Base Building: Construct underwater bases and furniture together, with synchronization for building activities, storage containers, fabricators, chargers, and other interactive structures.
  • Vehicle Synchronization: Share a multiplayer environment with synchronized Seamoth, Prawn Suit, and Cyclops vehicles, allowing players to coordinate underwater exploration.
  • Shared World Interactions and Communication: Synchronize item pickups, dropped objects, power management, and environmental interactions while communicating through built-in chat and remote-player HUD indicators.
  • Dedicated Launcher and Open-Source Development: Install and launch the multiplayer modification through a dedicated launcher, with publicly available source code, development documentation, and community contributions.

Project Samples

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License

GNU General Public License version 3.0 (GPLv3)

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Additional Project Details

Operating Systems

Linux, Windows

Programming Language

C#

Related Categories

C# Multiplayer Game, C# Game Mods

Registered

2026-11-07