Co-op Anything
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MODFORKMod / Fork or port · 2017 · Unity 2017.4

Cuphead

2 projects let you play Cuphead together. Here's how they compare, and which one to start with.

A
Recommended

CupHeads by Germanized

Rated A (Complete), above CupHeads (Multiplayer Everything fork) at C. It has story co-op, synced enemies, a shared world and shared items.

Repository ↗

Every project, side by side

Recommended

CupHeads

Germanized

A
CompletePlay the story start to finish together, or a stable official co-op mode.
Kind
MOD Mod
Stage
Playable
Co-op
91%
Synced
  • See each otherSynced
  • StorySynced
  • EnemiesSynced
  • WorldSynced
  • ItemsShared
Players say
Rate it and vote on its co-op %
Connect
Steam (no port forwarding)
Players
2
Tested
Not checked
Features
Story co-opSynced enemiesShared worldShared itemsEasy join, no port forwardingOpen source
Latest release
v1.6.2 Oct 15, 2026
Last activity
Active Oct 15, 2026
GitHub stars
21
About this project

Online version of the game's own two-player co-op, by Germanized (with Sh0kr). BepInEx 5 plugin with Steam lobby invites and Steam P2P (ISteamNetworking with relay allowed, so no port forwarding). Host owns the world, scenes, save and bosses; the guest plays Player Two on a mirror of the host's save. Last release v1.6.2 (2026-10-15). Source is public but the repo has no license file. Continued in the Multiplayer Everything fork (separate entry).

What you need

Your own copy of Cuphead.

Sources
Repository ↗Suggest a correction

CupHeads (Multiplayer Everything fork)

multiplayereverythingCo-op Anything

C
RoughAlpha builds, or partial sync without the story. Expect desyncs and crashes.
Kind
FORK Fork or port
Stage
In development
Co-op
61%
Synced
  • See each otherSynced
  • StorySynced
  • EnemiesSynced
  • WorldSynced
  • ItemsShared
Players say
Rate it and vote on its co-op %
Connect
Steam (no port forwarding)
Players
2
Tested
Automated tests
Features
Made with Co-op AnythingStory co-opSynced enemiesShared worldShared itemsEasy join, no port forwardingOpen sourceAutomated tests
Latest release
v1.7.0 Oct 27, 2026
Last activity
Active Oct 27, 2026
GitHub stars
0
About this project

Fork of Germanized's CupHeads, v1.7.0 pre-release (wire protocol 4). Adds a LAN/direct-IP TCP fallback (port 27140), a mod-only BepInEx ZIP instead of the installer, and a fix that reconciles the partner's cup health and death or revive with its owner. A same-PC lab with two game copies over the LAN fallback passes 15 checks (connect, world map, both cups moving, level load, boss HP, guest hits and death, revive by heart and by parry, back to the map); 6 mutants that each drop one sync path are all caught, and a 7th shows the health backup covers lost hit packets. Steam P2P between two real accounts is not yet tested. Write-up in games/cuphead.

What you need

Your own copy of Cuphead.

Sources
Repository ↗Suggest a correction

Know another co-op mod for Cuphead? Submit it.