Elden Ring Seamless Co-Op Mod Now Works with Shadow of the Erdtree, Adds Optional Invasions

Today, LukeYui has updated his Elden Ring Seamless Co-Op mod to work with the newly released Shadow of the Erdtree expansion. Here's the changelog shared by the modder:

• Compatibility with Elden Ring App Version 1.12, including Shadow of the Erdtree DLC
• Completely rewritten code; some old bugs (e.g., enemies falling through the floor) do not occur anymore * Items gained in conversations are now given to all players
• Event flags are properly synchronized now
• Enemy scaling options have been added
• Player death count is now a player banner option
• Have the option to view the current session password in-game
• ModEngine 2 compatibility
• Matchmaking verification: only people with the same mods will be able to connect to each other
• Added invasions (optional)

The modder also clarified there are currently some bugs still:

Related Story Shadow of the Erdtree Has Sold 5 Million Units in 3 Days

While not perfect, it has reached a state where it can be used to play Elden Ring and the DLC in coop. I'm aware of some bugs still present in it, and will continue working on it past the initial release - the next few days will be crucial so that I can work on fixing any problematic issues quickly should they arise.

The Seamless Co-Op mod was recently mentioned by none other than Elden Ring creator Hidetaka Miyazaki, who said that such a freeform cooperative system could well be implemented in future games made by FromSoftware.

For more on the Shadow of the Erdtree expansion (which already sold 5 million copies), read Wccftech's review:

With open-world fatigue setting in earlier this year due to the many open-world games released in 2024—like Final Fantasy VII Rebirth, Rise of the Ronin, and the PC versions of Horizon Forbidden West and Ghost of Tsushima—Shadow of the Erdtree's open-world design stands out as a testament to how the Elden Ring experience still surpasses anything else on the market.