OK, so basically I have never played HL, or any expansions. Not even CS. I somehow feel like I've missed out on an incredible game. (err... obviously) Anyway, is it still worth buying now? I've seen the whole HL collection very cheap now. Also, how is the content? (Mostly language, etc... I know FPS's are violent.) Inconveniently, my PC is in the middle of the house, where it can bother everyone. So, any thoughts would be appreciated. Thanks.