Where Are MARVEL Cosmic Invasion Save Files Located?
MARVEL Cosmic Invasion keeps one small cloud save per Steam account. Here is where it lives and how updates can wipe it.
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MARVEL Cosmic Invasion stores progress the old arcade way: a single small save file inside your Steam userdata folder, under app 2753970. There is no AppData folder and no Documents folder to hunt through. If the userdata remote folder is empty, the game simply starts fresh.
Patches have wiped this file for some players, which is why a manual copy matters more here than in most games. Back up the remote folder before every update. If progress vanishes after patch day, restore the copy with cloud sync paused and the run usually comes back.
Where MARVEL Cosmic Invasion stores this, by platform
[Steam]\userdata\[ID]\2753970\remote
Single gamesav.sav file holds unlocks and campaign progress. Disable Steam Cloud for the game before restoring a backup or the cloud copy wins.
~/.local/share/Steam/userdata/[ID]/2753970/remote
Same userdata layout on Linux and Steam Deck. Find your numeric ID folder by checking which one changed most recently.
Frequently asked questions
Why did MARVEL Cosmic Invasion lose my progress after an update?
Updates have overwritten the single cloud save for some players. Restore a manual copy of the remote folder with cloud sync off, launch once, then re-enable sync.
Which file do I back up for MARVEL Cosmic Invasion?
The gamesav.sav file inside userdata/[ID]/2753970/remote. It is tiny, so keep a dated copy somewhere safe before patches and character DLC drops.
Notice an outdated path? Let us know.