Ya know, I got HL2 the day it came out and I played it quite often. I would hardly consider it a short game though. I haven't even beaten it yet, granted I stopped playing sometime after that level in the city where you have a whole squad of followers.
For some reason or another the last few times ive decided to give it a try, it's been freezing up every so often, not in the same places either, but it will happen and well.. it sucks.. completely freezes up my pc. When I first got the game that never happened ><. So ive given up on HL2 till I can figure out whats wrong with my pc.
But... I did buy F.E.A.R. a few weeks back. Let me tell you, that game is awesome, but.. it IS short. I beat it about a week ago. It's an exellent first person shooter and an exellent gaming experience all around, but don't expect your traditional FPS ending, that's all ill say about that, well and... I can't wait for a sequel!!! That game is just awesome, even on the medium settings which I had to play it at just so my pc could handle it, it looks amazing. I can only drool in wonder of what a top notch PC would run it like. Bullet time should so be in every FPS from now on. XD