I'm sure there's info somewhere but I don't feel like googling it... nor am I actually going to buy this... just wondering.

Steam, HL2 requires Steam. As far as I know, Steam requires an internet connection. What if you don't have an internet connection or it's not working? Can you not play HL2?

I know for Windows XP activation you can call an 800# and activate but can you do that with HL2/Steam too?