

Various fonts were needed to be installed. In particular impact.ttf, lucon.ttf and verdana.ttf were needed.
Otherwise the game would crash after the intro movie. The missing font would be mentioned in the ctgw.log file in the steam game folder.
Only problem with the game were the missing fonts. They had only to be copied into a folder where the game could find them. For example in "Commander The Great War/data/fonts/" or the system font folder
After the intro the game would crash. I found out, the reason for this was the lucon.tff font missing on my system. Installing it, fixed the issue.
Lucon.tff apparently is a Windows font, missing on Linux. At least on all those distros I use and used. Simply downloading it and adding it to the system, made the game work.