I'm guessing you accidentally installed them as root? GOG games should not be installed like that.

I resolved the issue, thanks!

I set the folders to be writable (and readable) by everyone (so no more problems!) also because I'm trying tu run them from the steam library ("add to steam" button)... Should I have set the folders to be writable (and readable) for the same group of steam to enable save?

The games saves were in two different places... one game created a folder ".gamename" with root privileges (only root could open it) in home while the other saved the progress in the game folder, who seemed free from but the saves worked only when i extended the privileges...

I installed the games normally, from the gog sh... (chmod a+x then sudo ./gog_gamename.sh)

Also, I'm wondering...is possible to move the saves to other folders?

Many thanks!

PP

Edit: Liam got the problem! I thought that when installing something, I had to be root... I was wrong! Is it only for GOG games or for other application too?

It's possible to install games from gog as su, I have done this when I wanted a game to be accessible for multiple users on the machine, installing it to /opt. The only downside was the desktop launcher was then owned by root and had to be chowned by hand.

A user doesn't have to have write permissions to the game's directory, nothing gets written there when running the game. Unless the game creates config directories in the user's home during installation no harm is done.

Running the game for the first time as su, however, is a big no-no, as then all the config directories created during first run will be owned by root and will have to be manually chowned to the user, or deleted to be recreated on next (non-sudo) run. This also pertains to the installer (run by su) automatically starting the game at installation's end - it will then also run by su.