I recently purchased the Orange Box from Steam (it was the deal a couple weeks ago), and finally finished dling HL:2, only took about 4 days... But now even if I choose to start steam offline, it won't let me access HL:2. This doesn't make any sense since it's a single player game. I can play CSS, which is a multiplayer game offline, and various other games, but not HL:2. Are there any cracks or patches I can use so I can play this while not connected to the internet?