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MODMod · 2009 · IW 4.0

Call of Duty: Modern Warfare 2

2 projects let you play Call of Duty: Modern Warfare 2 together. Here's how they compare, and which one to start with.

D
Best bet so far

mw2_coop by stxlvn

Rated D like COD-MOD campaign co-op pack (iw4sp_codmod), but further along: in development, against abandoned. It has partial story sync, open source code and automated tests. None of these projects is fully playable together yet.

Repository ↗

Every project, side by side

Best bet so far

mw2_coop

stxlvn

D
ExperimentalPrototype, research build, or abandoned before it got far.
Stage
In development
Co-op
39%
Synced
  • See each otherSynced
  • StoryPartly
  • EnemiesUnknown
  • WorldUnknown
  • Itemssynced weapons
Players say
Rate it and vote on its co-op %
Connect
Direct IP
Players
2
Tested
Automated tests
Features
Partial story syncOpen sourceAutomated tests
Latest release
No release yet
Last activity
Active Oct 1, 2026
GitHub stars
-
About this project

Work in progress. MIT prototype for the 64-bit Steam build. A winmm.dll proxy plus load-time GSC patches on top of the game's own lockstep Spec Ops co-op netcode. Two copies play S.S.D.D. together (checkpoints, restart when both are down, saved progress), move on to the next mission together and share the Team Player convoy Humvee (turret for whoever boards first, seat swap) and the Wolverines! Humvee rides; in-game QA passes on both machines. Other missions not done; not playable through yet. Write-up in games/modern-warfare-2.

What you need

Your own copy of Call of Duty: Modern Warfare 2.

Sources

-

Repository ↗Co-op Anything write-up ↗Suggest a correction

COD-MOD campaign co-op pack (iw4sp_codmod)

D
ExperimentalPrototype, research build, or abandoned before it got far.
Stage
Abandoned
Co-op
48%
Synced
  • See each otherSynced
  • StoryPartly
  • EnemiesUnknown
  • WorldUnknown
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
Direct IP
Players
2
Tested
Player reports
Features
Partial story syncPlayer reports
Latest release
No release yet
Last activity
Stalled Oct 1, 2021
GitHub stars
-
About this project

COD-MOD 3.223 DLL (open source, no license, momo5502, re-enables the Spec Ops co-op netcode over direct IP) plus a closed x_coop.ff with campaign script changes by an unknown author, shared as a mega.nz pack used with Hamachi. Needs the 32-bit 1.0.159 build, so it no longer runs on the 64-bit Steam build of 2026. Players report freezes and rough missions; details in games/modern-warfare-2.

What you need

Your own copy of Call of Duty: Modern Warfare 2.

Sources
Project page ↗Co-op Anything write-up ↗Suggest a correction

Know another co-op mod for Call of Duty: Modern Warfare 2? Submit it.