So, yeah, Team Fortress 2 works! It was kinda laggy for me, but it downloaded perfectly, and nothing outside of things in-game blew up, so I'd say it worked well! Now, the question now, is whether to stop here for the moment and download Portal and try that out, or just keep getting better at TF2.
Also, apparently I do better with the Engineer than anyone. I had like 10 kills with no deaths, thanks to my inventions. =P