Unlike Steam or, hell, even Ubisoft Connect, the Epic Games Store still didn’t find it necessary to let us point to the installation directory for the game when we used the new launcher settings. Therefore, if you are using a fresh installation of EGS, it will Not watch your game, no problem. There was a slight problem that the company was in no hurry to fix. Of course, there are workarounds. There’s one listed on the Epic Games store, but there’s an even simpler way to do it that follows the same logic. Note that this only works if your factory settings are up to date. Here’s what you do.
Go to the game’s installation directory on your PC. You’ll need to remember where they’re stored off the drive, so if you can’t remember for whatever reason, you’ll want to do a search on that drive. The installation directory is almost always the game name. Step one: rename that folder by adding a number or letter at the end. You need to do this because EGS will not install a directory when a directory with identical names exists. Step two: find the game in your EGS library and install it in the same place as your original.
Third step: stop the download after a few seconds. Pause the game on your gallery page or go to your downloads on the left and click cancel. This will stop the process. Step four: go to the new installation folder on your drive and cut or copy the folder named “.egstore”. Go to your root folder and delete the .egstore folder in it then paste in the new folder. Step five: delete the new installation folder and rename the original folder by removing any numbers or letters you added.
We are at home now. Go back to EGS and click “continue” on the game in question. It will then verify the files. This may take a few minutes. If you try to do this with a game that hasn’t been updated, the game will start downloading from scratch, so try to avoid that. If your installation is the current version, it will verify it with no problem. Once done, you will be able to play the game without downloading anything.
Okay, this is only worth doing if the installation is on the larger side. If saving to the cloud isn’t enabled in the game, you’ll have to duplicate those as well, essentially the same requirement as we did here, but with different folders.
Frustratingly, even after all these years and all the money Epic has spent competing with Steam, it still lacks basic features like using existing installations, but maybe one day somehow they will receive. If not, it’s not the greatest pain in the world to go through these steps. However, if you have a large number of games installed, it can definitely take a while. It seems like a pretty simple fix for better functionality, so hopefully it’ll become an official option soon.
https://www.pcinvasion.com/egs-launcher-installed-games-fresh-install/ | How to make EGS launcher use your installed games after fresh install