hi.
i am new and just downloaded the game and when i try to start the game this msg appears: "Can't load OPENGL SUBSYSTEM" any advice on wat to do?
Yes, click this link (http://tremulous.net/phpBB2/search.php).
Well, the search function isn't always useful on this forum...
So, the short answer is to try updating your drivers.
And to tell us your system specs.
even without searching you could have looked at number of threads in the first few top pages with the same title.