Not only is the installation of the GOG Galaxy Client not optional as mentioned by djdarko, what bothers me is that multi-player is disabled unless you log in. Failure to launch the game with the GOG Galaxy Client, failure to have an internet connection, or failure to log into your GOG account, will disable in-game multi-player. Having to use the galaxy launcher itself doesn't bother me personally, but requiring it to call home and forcing me to log in definitely does. The entire point I purchased this game was for some good old LAN time fun.
