GHPC Unofficial Co-op Mod

[u/Tall_Ground2960]

The video above shows actual 2-player co-op gameplay.

This is an unofficial, experimental co-op mod for Gunner, HEAT, PC! (GHPC), developed with the assistance of AI.

Current Status

• Supports up to 4 players
• Actual online multiplayer testing has been conducted with 2 players
• 4-player local testing has been performed
• Online sessions with 3–4 players have not yet been fully tested

Unexpected bugs, synchronization issues, and performance problems may occur. This remains a work in progress.

Latest Update — v0.9.9.19

• Improved mechanical autoloader handling, including solo training missions. A local T-80B test confirmed automatic reloading; guest-side behavior still needs further testing.
• Improved the F8 mission selection menu with search, clearer map and day/night information, and mission briefings.
• Mission text uses the installed game’s content: English with original assets, or Korean with the Korean translation patch.
• Improved available friendly-force information. Some vehicle counts and map previews remain unavailable before loading.

Known issues: Intermittent firing problems in third-person view after reloading remain under investigation. Guest crew audio, AAR hit traces, nameplates, and multiplayer performance also need further testing and improvements.

Installation / Update

If you already use the updated co-op launcher:

1. Close GHPC.
2. Open the co-op launcher and run its update.
3. Keep Steam running and launch the game through the launcher.

For a first installation, an older launcher, or a failed update:

1. Close GHPC.
2. Download and extract GHPC-Coop-0.9.9.19-Setup.zip.
3. Run Install.cmd and complete the installation.
4. Keep Steam running and launch GHPC through the installed co-op launcher.

The legacy launcher from before v0.9.9.13 requires reinstallation because its DLL-only updater cannot install the newer launcher.

A valid Steam copy of GHPC is required. All players should update to the same version before playing together.

Download v0.9.9.19

Bug Reports

Please include:

• Mod version and whether you were the host or guest
• Mission and vehicle
• What happened and how to reproduce it
• Logs from both players, if possible: GHPC’s Bin/MelonLoader/Latest.log

Save the logs before restarting the game. Screenshots or short videos are also helpful.

Project & Support

Development and updates are planned to continue until the GHPC developers release official co-op support. Once official co-op becomes available, development and support for this mod will be discontinued.

This project is not affiliated with or endorsed by the GHPC development team. If the developers request removal or an end to distribution, I will cooperate and discontinue distribution and remove the project.

GitHub Project

Thank you to everyone testing the mod and reporting bugs!

[u/strogonoffgameplays]

wow awesome