[Magnum39]

Before you get your panties in a bunch I'm not using "the Official HL2Thread" because it has been locked!!!

I bought the game used, & am not interested in playing online anyway, & I didn't get any literature with it. How do I get to the single player game?
When I try to start the game, after doing the auto update, all I get is the registration dialogue. Is there something I'm missing? Where is the single player?