This guide will walk you through how to play Elden Ring with two of the most popular mods: Seamless Co-op and the Item & Enemy Randomizer, using Mod Engine 2 to safely launch them together.

You’ll be able to explore the Lands Between with friends, while every boss, mob, and item drop is completely unpredictable.

You’ll need all three of the following:

• Seamless Co-op
• Mod Engine 2
• Item and Enemy Randomizer

Make sure to download the most up-to-date versions of each.

• Download the Seamless Co-op mod.
• Inside the ZIP, find the folder called SeamlessCoop.
• Place this folder inside your Elden Ring directory at:


• Open ersc_settings.ini inside the SeamlessCoop folder.
• Set your password. Everyone you want to play with must use the same one.

• Download Mod Engine 2.
• Extract it somewhere easy to find, like your desktop or near your game folder.
• You will use this to launch Elden Ring with mods. The launcher file is called:


Do not launch the game from Steam when using mods.

• Download the Item and Enemy Randomizer.
• Move the entire randomizer folder into your Mod Engine 2 directory so it looks like this:


• Open the randomizer folder and run randomizer.exe.
• Choose your randomization settings and set a seed number.
• Click Run with Set Seed to generate the randomized files.

Important: Everyone in your co-op group must use the exact same version, settings, and seed.

• Go into your Mod Engine 2 folder and open config_eldenring.toml using Notepad.

• Near the bottom, find this line:

mods = [ { enabled = true, name = “default”, path = “mod” } ]

• Replace it with:

mods = [ { enabled = true, name = “default”, path = “randomizer” } ]

• Now scroll to the top and find:

external_dlls = [ ]

• Change it to point to your SeamlessCoop dll file. It should look something like:

external_dlls = [ “C:\Program Files (x86)\Steam\steamapps\common\ELDEN RING\Game\SeamlessCoop\ersc.dll” ]

Make sure this matches the actual path to where your game is installed. Use double backslashes ( \ ) in the path.

• To play, run launchmod_eldenring.bat from your Mod Engine 2 folder.

This disables Easy Anti-Cheat and loads both the randomizer and Seamless Co-op together. Do not launch the game through Steam while mods are active.


Troubleshooting & Tips

• If you get a black screen, make sure you’re using launchmod_eldenring.bat and not starting from Steam.
• If items or enemies are different between players, double-check the seed and mod version are the same for everyone.
• If Seamless Co-op doesn’t load, verify that the dll path is correct and not commented out in the config file.
• Delete any older SeamlessCoop or Elden Mod Loader files if you’ve used mods before. Old leftovers can cause conflicts.

Will I get banned for using this?
No. This setup disables online play and bypasses EAC. Just don’t launch through Steam while it’s active.

Do all players need to do the setup?
Yes. Every player must have the exact same version of all three mods and use the same settings and seed.

Can more than two people play?
Yes. Seamless Co-op supports up to 6* players.

Can we invade or get invaded?
No. Seamless Co-op disables PvP and invasions to keep sessions stable.
This can be changed in seamless coop settings. But this allows cheating users to enter your world with no limit.

• You can change your randomizer seed anytime, just make sure your friends do the same, and that all settings match.
• If your game isn’t on the C: drive, adjust the dll path in the config file to match your setup. There is known issues with not having the game on your main drive.

Once it’s running, you’ll be able to explore the entire game together with totally shuffled enemies, bosses, and items. Every run feels different and fresh.

If you run into problems, leave a comment and I’ll try to help.