Graveyard Keeper Multiplayer

Graveyard Keeper — Multiplayer (2-player co-op)

Adds 2-player co-op to Graveyard Keeper. Connection is over Steam P2P — no server to set up, no port forwarding, no IP addresses. One of you hosts, the other joins through a regular Steam invite.

Status: beta. The core loop is fully playable together: world, building, crafting, graves, inventory. NPC villagers and dungeon mobs are not synced yet (see Known limitations).

⚠ Back up your save first

Please copy your save folder before playing with this mod, and ideally use a separate save rather than your main run. This is a beta written and tested by one person and two friends — it has broken saves before, in ways that followed the player back into singleplayer, where removing the mod didn't help because the damage lives in the save file.

Saves are here: %USERPROFILE%\AppData\LocalLow\Lazy Bear Games\Graveyard Keeper — paste that into the Explorer address bar, copy the whole folder somewhere safe, and you can always roll back.

What is synced

• []Both players in the same world — the host's save is transferred automatically on join[/]

  []Movement, animations, day/night time (anyone sleeping advances time for both)[/]

  []Tree chopping, stone breaking, mining loot, foraging, garden beds[/]

  []Graves — digging, reburying bodies, repair; carried corpses with handoff between players[/]

  []Building — full cycle: place → construct → demolish[/]

  []Crafting at workstations — shared queues, live progress bar on your partner's side[/]

  []Inventory — shared chests (both can use them at once), stockpiles, item exchange[/]

  []Weather, shared story world-flags[/]

  []Personal progress — the 2nd player has their own character save (skills, HP, techs, perks, quest journal) layered over the host's world. Shared world, personal progress — the Stardew Valley model[/]

Installation (step by step)

Step 1 — Install BepInEx (the mod loader):

• []Download BepInEx 5. 4. 23. 5 (x64) — the file is BepInEx_x64_5. 4. 23. 5.zip from the BepInEx releases page[/]

  []Extract it directly into the game folder — the one with Graveyard Keeper.exe (usually C:\Program Files (x86)\Steam\steamapps\common\Graveyard Keeper). After extracting you should see a BepInEx folder and winhttp.dll next to the game's exe[/]

  []Launch the game once and quit — this makes BepInEx generate its folders (including BepInEx\plugins)[/]

Step 2 — Install the mod:

• []Drop Multiplayer.dll (from the Files tab) into Graveyard Keeper\BepInEx\plugins\[/]

Both players do steps 1–2, with the same version of the mod. Launch the game through Steam — otherwise Steamworks won't initialize.

How to play

Host:

• []Load your save[/]

  []Press F11 — a lobby is created and the Steam invite overlay opens[/]

  []Invite your friend[/]

Client:

• []Accept the Steam invite[/]

  []The mod downloads the host's save and joins you into the world[/]

Game progress doesn't matter — you can invite from day 1. In a brand-new game, press F11 right after the interface appears (early on, at the graveyard).

F11 seems to do nothing?

The lobby is created — the invite window is drawn by the Steam Overlay, so if the overlay is disabled you won't see anything. Two ways out:

• []Enable the overlay: Steam → Settings → In Game → Enable the Steam overlay while in-game (also check the game's Properties)[/]

  []Or skip it: press F11 anyway, then your friend joins via the Steam friends list — right-click your name → Join Game. Works even with the overlay off on both sides[/]

Known limitations

• []2 players max (for now)[/]

  []NPC villagers and dungeon mobs/zombies are not synced yet — you'll each see your own[/]

  []Both players need the game on Steam (P2P runs through Steam networking)[/]

  []DLC: a player without the DLCs can join and play fine, until the host starts a paid DLC storyline — then the save won't load for them[/]

  []Rare: if both players grab the very last item of the same stack in a chest at the exact same moment, 1 item can duplicate[/]

Bug reports