Modding, if you do not know what you are doing, can be dangerous. DO NOT download files on the internet without certainty of what it is and what it does. Somebody may claim that a website has a mod, but instead it will install a virus on your computer. Below is a list of sources where it is recommended to find Civilization VI mods.
While in the process of joining a server, downloading resources, etc, the game seems to hang and after a while, perhaps during the "sending client info" portion the game crashes, usually without any error messages. Error does not give much information, however, the process for Garry's mod is killed.
If this is indeed your problem, download the libnss-sss package from Ubuntu's repository , extract the libnss_sss.so.2 from the downloaded package, and place it at ~/.local/share/Steam/steamapps/common/Stellaris. The game should now load properly.
Note all missing librarys and try installing them from the standard repositories and the AUR. If after that you are still missing librarys you can search on the web for them and download corresponding packaged .rpm x86 (32bit) files and extract them into steamapps/common/Tomb\ Raider/lib/i686/ to provide the missing librarys. Run ldd again and see whether you have all the necessary librarys installed. If there are no more missing librarys and the added librarys are of the correct version, architecture and 32/64bit word length and are placed on one of the the linkers search paths then the game should work.
To start with, players should identify the Civilization 6 mod that they want to install on Steam Workshop and copy the URL (ending with "?id=NUMBER"). They should then visit steamworkshop.download, paste the previously-copied URL into the search bar, and click "Download" to locate the Civ 6 mod. 2b1af7f3a8