Dark Souls II: Scholar of the First Sin · PC mod

Seamless Co-op for Dark Souls 2

Play the whole game with a friend. Their sign places itself and your game summons it — from anywhere, even Majula — and the co-op doesn't fall apart after a boss, a death or a new area.

Waiting for LukeYui's mod? Then don't download this one: his mod will give you a much nicer experience. This version is for those who, for whatever reason, want to play co-op on their saves from the regular, unmodded Dark Souls II.

Download the latest release Source on GitHub

Free and open source (MIT)
Steam version, Windows 10/11
Your own server: no invasions, no strangers

The co-op menu in the game: you are in the host's world, two players in the lobby

Notifications: Seamless Co-op is ready, a player joined the lobby, the host will summon you now

What changes

One summon for the whole game

A new game together, from the very first minute

You need no saves, no characters and no progress: join the host's lobby before either character exists, walk to the Fire Keepers' Dwelling side by side and each of you makes your own character there — name, class, looks — in one world. The whole game from the crones onwards is co-op.

Summon without the ritual, from anywhere
Join from the in-game menu and that's it: the sign appears right under the host's feet and the host's game summons it by itself. No effigies, no soapstone hunting, no phantom timer — and it works where signs normally can't be placed.
The session doesn't end
Boss kills, deaths, bonfires and area changes don't send the guest home.
No co-op fog walls
The guest walks the host's whole world, including areas where summoning is normally blocked.
The world as the host has it
Gates, shortcut bridges, lifts and statues stand for the guest the way the host left them, and enemies the host has killed stay dead.
Bonfires for both
The guest rests at the host's bonfires, and resting brings the enemies back for both players.
Fair loot
What the guest picks up in the host's world is theirs only, and it's gone from their own world afterwards — nothing is looted twice.
Death isn't the end
A guest who dies comes straight back to the host's world. The host dying doesn't kick anyone.
Bosses together
The host walks into the boss fog first and the guest follows; nobody comes back until the fight is decided.

Also: the guest can talk to NPCs; an in-game menu on F1 in English and Russian with a password-protected lobby; rejoining after a crash; a crash log for bug reports; and a one-click server for the host.

Getting started

Set up once, then just play

Every playerYou need

Dark Souls II: Scholar of the First Sin on Steam (PC)
Windows 10 or 11
Radmin VPN (free), everyone in one network

OnceThe host

Extract the host archive into the game's Game folder, next to DarkSoulsII.exe.
Run StartServer.bat. It shows your address for friends and makes the key file.
Send your friends the address and ds2_server_public.key.

OnceA friend

Extract the joiner archive into your Game folder.
Put the host's ds2_server_public.key there too.
Write the host's address after server_ip= in ds2_seamless_coop.ini.

Then play

Host: F1 → Host a lobby → set a password. Friend: F1 → Join a friend → address and password, then stand somewhere (not at a bonfire) — the host's game summons you by itself.

Full guide, settings and troubleshooting in the README →

Screenshots