I downloaded the Marathon trilogy for free, it was on the bnet homepage, so no it's not pirated. And when I open it and then select the files to run it, it goes to the start menu, I click new game and the it shows the first pic that says arrival and then music starts playing and then it goes black and I can't do anything, I tried Ctrl+Alt+Delete but it just brings up the cursor. I don't know what happened!
(Didn't know where to post)
[Edited on 12.13.2011 7:17 PM PST]