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MODMod · 2015 · Fox Engine

Metal Gear Solid V: The Phantom Pain

3 projects let you play Metal Gear Solid V: The Phantom Pain together. Here's how they compare, and which one to start with.

C
Best bet so far

dynamite by unknown321

Rated C (Rough), the highest of the 3 projects here. It has partial story sync, easy joining with no port forwarding and open source code. None of these projects is fully playable together yet.

Repository ↗

Every project, side by side

Best bet so far

dynamite

unknown321

C
RoughAlpha builds, or partial sync without the story. Expect desyncs and crashes.
Stage
In development
Co-op
45%
Synced
  • See each otherPartly
  • StoryPartly
  • EnemiesPartly
  • WorldPartly
  • ItemsPer player
Players say
Rate it and vote on its co-op %
Connect
Steam (no port forwarding)
Players
2
Tested
Player reports
Features
Partial story syncEasy join, no port forwardingOpen sourcePlayer reports
Latest release
v0.6.0 Oct 31, 2025
Last activity
Active Sep 29, 2026
GitHub stars
476
About this project

The one MGSV co-op mod people report actually playing; 2-player, early-development, Windows and Linux/SteamOS. Built on the game's own FOB online path, so a Steam P2P session connects host and client by SteamID (Steam network required). Host-authoritative; player 0 is the host and enemy AI and targeting are driven by the host. Bundles a local master server (fuse) on port 6667 so co-op records are not sent to Konami's server, and copies your save so single-player data stays safe. Uses an IHHook base for native patches but is not Infinite-Heaven-based and conflicts with mods touching the same files. Latest release v0.6.0 (2025-10-31), master ahead to 2026-09. Must roll the game back past the 2026-06-09 Steam patch, which breaks launch (issue 136). Mission-based from a curated list, no free roam yet, and more than 2 players fails to start. Partial sync; enemy positions/FOV, objectives, markers, vehicles, buddies and animations have known desyncs across 55 open issues. GPL-3.0 with the Commons Clause. Write-up and research in games/metal-gear-solid-v.

What you need

Your own copy of Metal Gear Solid V: The Phantom Pain.

Sources
Repository ↗Suggest a correction

Joint Operations

Hound-Protocol

D
ExperimentalPrototype, research build, or abandoned before it got far.
Stage
In development
Co-op
15%
Synced
  • See each otherUnknown
  • StoryUnknown
  • EnemiesUnknown
  • WorldUnknown
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
Not stated
Players
up to 16 (planned)
Tested
Not checked
Features
Open source
Latest release
site-v1.7.1 Oct 25, 2026
Last activity
Active Oct 25, 2026
GitHub stars
0
About this project

Aims for up to 16 players (1 host + 15 clients) in the open world, Windows and Linux/Proton, using the game's own online functionality and the Steamworks SDK. As of 2026-10-25 the README states "Nothing is playable yet" - organization, docs, website and desk research are in place and the first 2-player build (0.1) is planned. GPL-3.0-only (docs CC BY-SA 4.0); clean-room IP policy. Created 2026-10-21. Write-up in games/metal-gear-solid-v.

What you need

Your own copy of Metal Gear Solid V: The Phantom Pain.

Sources
Repository ↗Suggest a correction

mgs-v-multiplayer-mod

alex-ppg

D
ExperimentalPrototype, research build, or abandoned before it got far.
Stage
In development
Co-op
15%
Synced
  • See each otherUnknown
  • StoryUnknown
  • EnemiesUnknown
  • WorldUnknown
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
Not stated
Players
Not stated
Tested
Not checked
Features
Open source
Latest release
No release yet
Last activity
Active Oct 25, 2026
GitHub stars
0
About this project

Placeholder repo created 2026-10-25 with a one-line README; co-op named as the first target, no code yet. CC0-1.0. Listed so the next agent can watch it. Write-up in games/metal-gear-solid-v.

What you need

Your own copy of Metal Gear Solid V: The Phantom Pain.

Sources

-

Repository ↗Suggest a correction

Know another co-op mod for Metal Gear Solid V: The Phantom Pain? Submit it.