Dark Souls II: Scholar of the First Sin - Game Mod - DS2 Seamless Co-op v.0.0.3 - Download

Seamless Co-op is a mod for Dark Souls II: Scholar of the First Sin, created by LukeYui. If you end up enjoyoing this mod please consider supporting it’s creator through Ko-fi or Patreon.

Description:

Simply put, the mod allows you to play with friends throughout the entirety of the game with no restrictions. With this, it's theoretically possible to play the game from the tutorial up to the final boss completely in one co-op session.

1. If a player dies, they will respawn in the same world at the last bonfire they rested at. The session will not be terminated.
2. Defeating enemy bosses and clearing areas no longer sends co-operators home.
3. All fog walls/barriers that usually restrict the multiplayer zone are gone.
4. All NPC dialogue and talk events will be synchronised
5. When one player rests at a bonfire the world state will reset for all players
6. Game progression events completed in online play will also progress the game in your own world.
7. You can play with 5 other players in the open world.
8. An overhaul to Dark Souls II's peer-to-peer connection system, using Steam's newer networking API
9. Completely re-implemented the voice chat system & converting it to a proximity-based voice chat system

Mod Items

1. Pharros' Heliograph - Used to open (host) a seamless online session
2. Fragment of Brilliance - Used to join a seamless session as a friendly player
3. Fragment of Malevolance - Used to invade a seamless session as a hostile player
4. Obscuring Stone - Used to disconnect from a seamless session
5. Petrified Fingers - Used by the host to increase invader count and frequency
6. Hallucinogenic Elixir - Used by the host to change the world's rules
7. Cursed Soul Fragment - Represents world affliction build-up
8. Transient Curse - Represents proof of a disaster felled
9. Mirror Talisman - Used to join the Mirror Knight covenant and invade during the boss fight with the Looking Glass Knight
10. Fragment of Sin - Used to join the Blue Sentinels covenant and invade sinners [ WIP / NON-FUNCTIONAL]
11. Extravagant Bell - Used to join the Bell Keepers covenant and invade trespassers to the Belfy areas [ WIP / NON-FUNCTIONAL]
12. Severed Tail - Used to join the Rat King covenant and invade trespassers to the Doors of Pharros [ WIP / NON-FUNCTIONAL]
13. Darkcaller Bell - Used to join the Pilgrims of Dark covenant and invade trespassers to the Abyss [ WIP / NON-FUNCTIONAL]
14. Ancient Dragon Ring - Used to join the Dragon Remnants covenant and invade trespassers to the Ancient Dragon [ WIP / NON-FUNCTIONAL]

Quality of Life Improvements

Along with core function of this mod, there are a number of quality of life improvements that you might like:

A streamlined connection system means that co-operators can join the host from anywhere in the world. So even if you do disconnect, you can very quickly re-join and continue where you left off.

1. In addition to this, you will find some other game adjustments:
2. Allowing the user to set the volume of the title menu
3. Fixing the "Disable double clicking" option not working correctly for keyboard and mouse players
4. Re-addition of the server timed-exclusive cosmetic items from the original Dark Souls II
5. Conversion of the controller deadzone area to a radial deadzone
6. Allowing the user to skip the ending credits once the game is complete (normally unskippable in NG, lasts about 9 minutes)
7. Option for borderless fullscreen mode

Balancing

This mod undoubtedly makes the game much easier. To try and offset this and preserve the game's challenge, mechanics have been introduced in addition to the base game's enemy health pool increases as you would normally get with increasing phantoms:

1. You may customise scaling to your preference
2. Players cannot sit at a bonfire whilst another player is fighting a boss
3. Dying during a boss battle or invasion will put your character into limbo, spectating other players until either everyone in the party has been defeated, or a player rests at a bonfire.
4. (Optional) Dying in a session will afflict your character with a cursed soul fragment, increasing the difficulty of enemies. Dying too many times without resetting at a bonfire will cause disaster to occur in the world.

Invasions:

If enabled in the ini file (allow_invaders = 1) then other players will be able to join your session as an evil spirit and attempt to kill you and your party.

During an active invasion, you cannot warp or use bonfires to rest. Until you defeat the invader and banish them back to their own world.

If you would like to invade a player, then use the fragment of malevolence item in-game and you will join a random player's session (within your matchmaking range) and be able to engage in PvP.

Can this ban me?

No. The mod prevents you from connecting the FromSoftware's matchmaking servers, and it uses save files different to the non-modded game. There's no way to get banned using this mod unless you modify it with the intent of connecting to vanilla players.

As this mod introduces new items not found in the base game, it uses a different save file to the normal '.sl2' extension. This means that you cannot access your Seamless Coop save files in the base game, and vice versa. Do not revert mod save files back to vanilla save files, as you will likely get banned.

Installation

You do not need any other mods to use seamless co-op. The NexusMods 'Requirements' tab is mods that require Seamless Coop, not the other way around.

Compatibility with other mods has not been tested. You may use other mods, so long as they do not interfere with the multiplayer aspect of the game, or edit any of the items the mod uses to function.

Download the mod

Extract the package you downloaded, and move the following files to your Dark Souls II Scholar of the First Sin folder (usually in "C:\Program Files (x86)\Steam\steamapps\common\Dark Souls II Scholar of the First Sin\Game")

Edit "ds2sc_settings.ini" to your chosen co-op password

Launch the mod using "ds2sc_launcher.exe"

You don't really have to uninstall the mod. You can use the launcher when you want to play it, otherwise just run the game normally. If you'd like to remove it fully, simply delete the files you downloaded from here.

• Last update: Friday, October 2, 2026
• Genre: RPG
• File size: 14.7 MB