FGUY Mod: Family Guy: Back to the Multiverse (PC)

A free community mod that adds online multiplayer to Family Guy: Back to the Multiverse, plus fixes and quality-of-life for the PC version. You need your own copy of the game; this mod contains none of its files.

Install

1. Download FGUYMod--Setup.exe from the latest release.
2. Run it. It finds the game (or asks where it is) and installs the mod. Windows may warn that the file is from an unknown publisher (it isn't code-signed): click More info > Run anyway.
3. Start the game as usual.

Run the setup again any time to update or remove the mod. The mod also tells you on the ONLINE screen when there's a new version, and installs it for you.

What it adds

Online play (Main Menu > ONLINE)

• Host or join lobbies (public, or by code), pick character, skin and team; the host picks mode, map and rules.
• Multiplayer modes and Story co-op, every player with their own full screen.
• Keyboard and mouse or controller, with your own settings.
• Lobby chat, pings in the match, rematch vote, spectating in Multiverse Madness.
• Rejoin: left a match or your game closed? Its lobby shows REJOIN MATCH while it's still on.
• Story co-op: one player's pause pauses everyone, with Restart Level and Mission Select.
• Matches stay in sync (lockstep, checked all the time); if one ever doesn't, a report is saved in FGUYMod\reports to send in.

Mods (Main Menu > MODS)

• Put separate mods in FGUYMod\mods\ and switch them on and off. Making one: see sdk/.

PC fixes

• Runs on Vulkan (DXVK, the translation Valve's Proton uses) for smoother, more reliable play on modern PCs. A PC without Vulkan 1.3 falls back to DirectX 9 by itself; to always use DirectX 9, set Renderer=d3d9 in FGUYMod\FGUYMod.ini.
• Borderless fullscreen, every resolution your monitor has (4K too), frame rate cap or uncapped.
• The Windows key works; keeps running when you alt-tab (optional).

Settings

FGUYMod\FGUYMod.ini in the game's folder (open with Notepad): display mode, frame rate, online name, lobby server. Most display settings are also in the game's own Options > Screen.

For developers

• src/loader/: the mod itself, a dinput8.dll loaded by the game. Build with build.bat (Visual Studio 2022, C++). Online play: netplay.cpp (lockstep), online.cpp (lobby), handoff.cpp.
• src/ui/, tools/ui/: the in-game screens (Scaleform ActionScript, compiled into dist/FGUYMod/ui/*.fgpatch patches that hold only our changes, never game data).
• server/: the lobby + relay server (one Python file, see its README).
• src/installer/, tools/make_release.ps1: the setup and the release files.
• tools/test_*.ps1: automated tests that run copies of the game on one PC.
• RESEARCH_NOTES.md: what we've learned about the game's internals.

DXVK (dist/FGUYMod/dxvk) is by Philip Rebohle and contributors, under the zlib licence.

The online loading screen's music (a re-recording, in the release downloads only - not in this repository) is by Andrew Stockton.

This mod was made using AI (Claude, by Anthropic).