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MODFORKOFFICIALMod / Fork or port / Official mode · 2017 · Phoenix

Overgrowth

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

A
Recommended

Full Coop (Campaign, arena...)

Rated A (Complete), the highest of the 5 projects here. It has story co-op, synced enemies, a shared world and open source code.

Website ↗

Every project, side by side

Recommended

Full Coop (Campaign, arena...)

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
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
LAN or split-screen
Players
1-4
Tested
Player reports
Features
Story co-opSynced enemiesShared worldOpen sourcePlayer reports
Latest release
No release yet
Last activity
Stalled Oct 1, 2021
GitHub stars
-
About this project

Local split screen only (F9 adds a player, F10 removes). Online only via Steam Remote Play Together. MIT source. Players report it still works as of 2023-12; over Remote Play both players sometimes drive the same character. networking value is the closest schema option; it is really shared-screen.

What you need

Your own copy of Overgrowth.

Sources
Project page ↗Suggest a correction

Overgrowth Story Multiplayer

B
PlayableYou can play together, with known gaps in what syncs or a rough setup.
Kind
MOD Mod
Stage
Partial
Co-op
66%
Synced
  • See each otherSynced
  • StoryPartly
  • EnemiesSynced
  • WorldPartly
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
Steam (no port forwarding)
Players
Not stated
Tested
Player reports
Features
Partial story syncSynced enemiesEasy join, no port forwardingPlayer reports
Latest release
No release yet
Last activity
Stalled Jun 1, 2025
GitHub stars
-
About this project

Adds the campaign to the official prototype's multiplayer menu (needs the multiplayer beta branch). Author lists rough latency, client moving during dialogue, kill barriers killing the host, and guests waiting for the host's level load. No source found.

What you need

Your own copy of Overgrowth.

Sources

-

Project page ↗Suggest a correction

Overgrowth Online (CoreFX)

crxhvrd

C
RoughAlpha builds, or partial sync without the story. Expect desyncs and crashes.
Kind
FORK Fork or port
Stage
In development
Co-op
51%
Synced
  • See each otherSynced
  • StoryPartly
  • EnemiesUnknown
  • WorldUnknown
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
Steam (no port forwarding)
Players
Not stated
Tested
Automated tests
Features
Partial story syncEasy join, no port forwardingOpen sourceAutomated tests
Latest release
No release yet
Last activity
Active Oct 27, 2026
GitHub stars
3
About this project

Engine fork with rewritten movement replication (local player simulation, snapshots, clock sync), a story co-op mode, revive, server browser, Steam friend join and direct IP. Nine days old, one author, daily builds; release 0.40.0 (2026-10-23). Apache-2.0. Bundled "Overhaul" mod is optional but must match across players. Tested with two real clients on one PC (games/overgrowth): join, first story level with its cutscene, movement sync and a level change pass; a join is refused when Workshop mods are subscribed (order-dependent mod check, bug reported in the write-up). Enemies, items, dialogue choices, checkpoints and deaths not yet checked.

What you need

Your own copy of Overgrowth.

Sources
Repository ↗Suggest a correction

Wolfire Online Multiplayer Prototype

C
RoughAlpha builds, or partial sync without the story. Expect desyncs and crashes.
Kind
OFFICIAL Official mode
Stage
In development
Co-op
51%
Synced
  • See each otherSynced
  • StoryPartly
  • EnemiesSynced
  • WorldPartly
  • ItemsUnknown
Players say
Rate it and vote on its co-op %
Connect
Steam (no port forwarding)
Players
Not stated
Tested
Player reports
Features
Partial story syncSynced enemiesEasy join, no port forwardingOpen sourcePlayer reports
Latest release
No release yet
Last activity
Stalled Apr 1, 2022
GitHub stars
-
About this project

Steam beta branch internal_multiplayer_testing (2021-12-15). Host simulates everything; clients send input and receive poses, so remote players report heavy input lag. Campaign levels are only exposed through a mod (see Story Multiplayer). Code is in Source/Online of the open-source engine; no upstream commits to it since open-sourcing.

What you need

Your own copy of Overgrowth.

Sources
Project page ↗Suggest a correction

OGMP

ogmp

D
ExperimentalPrototype, research build, or abandoned before it got far.
Kind
MOD Mod
Stage
Abandoned
Co-op
26%
Synced
  • See each otherSynced
  • StoryNot synced
  • EnemiesNot synced
  • WorldNot synced
  • ItemsNot synced
Players say
Rate it and vote on its co-op %
Connect
Dedicated server
Players
Not stated
Tested
Not checked
Features
Open source
Latest release
v0.0.4 Nov 9, 2015
Last activity
Stalled Mar 3, 2019
GitHub stars
11
About this project

Pre-1.0 alpha-era mod: presence, chat and positions through a Linux server. Public server gone by 2020. GPL-2.0.

What you need

Your own copy of Overgrowth.

Sources
Repository ↗Suggest a correction

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