Runs fine on mine, but I'm running a 7800GTX with an Athlon64 X2 4400+ and a gig of ram. Well... actually... when I say it ran fine - it crashed to the desktop after 30 minutes. I'm not sure if that a bug with HL2:LC or the fact that the graphics card might have been getting a little toasty.. IT crashes similarly in Black and White 2 after about an hour.. Although funnily - it
doesn't crash after 2 hours of Live for Speed (a simple game, although I'd cranked it up to max AA and AF).
I have to say - HL2:LC impressed me about as much as HL2 did. Looked lovely... Nice physics... Nice sound (when I eventually got around the surround sound bug with HL2 thats documented in the forums but still not fixed)... Nice AI... Somehow I still got bored... Again. There is something missing that makes it a fun game for me. The problem is - the actual gametype has now been "done to death". Its all the same; turn a corner - shoot someone - pick up their ammo and weapon - use that to kill guy 2 - get ammo and health - kill guy 3 - and so on... Apart from the eye candy, its really quite a pants game overall (IMHO). The physics on that scale have been done before. The sound is nothing new really. The AI aint bad - but its still nothing compared to human opponents. HL2 suffers in PRECISELY the same way Doom 3 did for me (and I can probably garuntee Quake 4 will be the same too). Oh well - I'm probably just hard to please!