Additional info: This is not a steam issue! This is a firejail issue. I just checked my steam.profile and all those directories are whitelisted and created by firejail.
I usually check to see if it's firejail before making bug reports but this time I forgot. 99/100 times it's firejail!
For future peoples and those that don't know how to check if firejail is messing with steam, launch the game without firejail in the terminal using /usr/bin/steam or /usr/bin/steam-native if your using steam-native. If your issue is gone your issue is with firejail not steam.
Sorry for the false bug report. This issue is closed.
Nothing extracted yet.
Your system information
tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]Please describe your issue in as much detail as possible:
I expect only games I own to make folders. I don't want any program polluting any directory with unnecessary/useless files or folders! It just started happening. I don't own killing floor, prey or anything from paradox. I don't even know what mbwarband or klei are. All directories are empty when steam creates them.
Steps for reproducing this issue:
remove hidden folders in home for games I don't own:
cd ~/ && rmdir .prey .paradox* .killingfloor .mbwarband .kleistart steam or steam-native (both are installed and both have the same behavior)
repeat