Where Do You Find the Seamless Co-op Save File? A Complete Guide

If you're playing Elden Ring (or another FromSoftware title) with the Seamless Co-op mod, one of the most common questions that comes up is: where does the mod actually store your save file — and how is it different from your vanilla save? Getting this wrong can mean lost progress, corrupted data, or accidentally overwriting hours of gameplay. Here's a clear breakdown of how Seamless Co-op handles save files and what you need to know before you dig around in your file system.

What Is the Seamless Co-op Mod and Why Does It Use a Separate Save?

Seamless Co-op is a popular community mod — most notably for Elden Ring — that overhauls the game's multiplayer system to allow persistent, uninterrupted cooperative play without the normal session limitations. One of its most important design decisions is that it creates and uses a completely separate save file from your standard game save.

This is intentional. The mod's developer built it this way specifically to protect your vanilla save from any risk of modification, corruption, or ban flags that could arise from using modded files. The result: you have two distinct save profiles — one for unmodded play and one for Seamless Co-op.

Where the Seamless Co-op Save File Is Located

For Elden Ring, the Seamless Co-op save file is stored in the same base directory as your standard save, but under a different filename.

The default path is:

C:Users[YourUsername]AppDataRoamingEldenRing[SteamID] 

Inside that folder, you'll find:

The .co2 extension is the key identifier. The Seamless Co-op mod reads from and writes to this file exclusively during modded sessions. Your .sl2 file is never touched while playing through the mod.

How to Access the AppData Folder

The AppData folder is hidden by default on Windows. To reach it quickly:

1. Press Windows + R to open the Run dialog
2. Type %appdata% and hit Enter
3. Navigate to EldenRing → your Steam ID folder

Alternatively, paste the full path directly into File Explorer's address bar, replacing [YourUsername] with your actual Windows username and [SteamID] with your numeric Steam ID.

Variables That Affect Save File Behavior 🗂️

Not everyone's setup behaves identically. Several factors influence how and where your Seamless Co-op save is stored and accessed:

Steam installation path — If you installed Steam or Elden Ring to a non-default drive or directory, the AppData path may differ. However, the save file itself still routes through Windows AppData by default, not the game's installation directory.

Mod version — Different versions of the Seamless Co-op mod have been released over time. Older versions may handle save file naming or location slightly differently. Always check the mod's documentation (typically found on its Nexus Mods page or included README) for the version you're running.

Multiple Steam accounts or users — If more than one person plays on the same PC, each Windows user profile and each Steam ID generates its own folder. Save files are not shared across accounts.

Cloud saves — Steam's cloud sync is generally not compatible with the .co2 save file in the way it handles standard saves. Your Seamless Co-op progress typically stays local unless you manually back it up.

Backing Up Your Seamless Co-op Save

Because cloud sync isn't reliable for the .co2 file, manual backups are strongly recommended. The process is straightforward — copy the .co2 file to a secondary location (an external drive, cloud storage of your choice, or even a labeled folder on your desktop) before major play sessions or mod updates.

Losing a Seamless Co-op save can mean starting your co-op character entirely from scratch, since progress in that mode is stored exclusively in that file.

What Happens If You Start a New Seamless Co-op Session Without an Existing Save?

If no .co2 file exists when you launch the mod, Seamless Co-op will generate a fresh one automatically. This is effectively a new character — it won't inherit progress from your vanilla .sl2 save. The two save ecosystems are functionally separate from the moment the .co2 file is created.

Some players are surprised to find their standard game progress doesn't carry over. That separation is a feature, not a bug — it keeps your vanilla experience intact and distinct. 🎮

A Note on Other Games Using Seamless Co-op Frameworks

While Elden Ring is the most prominent example, Seamless Co-op-style mods exist for other FromSoftware titles and occasionally other games. The save file behavior — a separate extension, same AppData-style directory — tends to follow a similar pattern, but the exact file names, extensions, and paths will vary by game and mod version.

If you're using a Seamless Co-op implementation for a different title, the mod's own documentation is the definitive source for that game's specific save location.

The Spectrum of Setups

For most players on a standard Windows PC with a default Steam installation, the path above is exactly where the file lives. But players running Steam on secondary drives, using Linux with Proton, managing multiple Steam accounts, or running older mod versions may find their save structure looks a little different. The .co2 extension and the AppData routing are consistent reference points — but how they surface on your specific machine depends on the details of your own configuration. 🔍