No problem. To answer your question, YES you should buy half-life 2. It is one of the highest rated games on the market and is really fun. i also suggest you get hl2 episode 1, its the follow up to hl2 and is also awesome!
The poll speaks for itself - don't be a n00b, by HL2
In all seriousness, the game isn’t for everyone so I’d try out the demo which can be downloaded from Valve’s site ([link=hyperlink url]http://steampowered.com/v/index.php?area=game&AppId=219&cc=US[/link]). Personally I loved the game – the graphics are mind blowing, the puzzles challenging at times, and gameplay that lasts forever. I purchased the retail copy which came with HL2, CS:Source and HL2 Deathmatch so it was totally worth the cash.
HL2 Deathmatch is every man for himself fun! Grab sings, barrels, toilets, chairs....anything you want and toss them at a buddy! Of course, there's weapons too, but what fun are those? I can't count how many times I've wished I could throw a toilet at someone in the ava server....