Yes, Lost Coast was a pretty good expansion level with the Half Life 2 series with the Source engine. Fairly dated though, it is my favorite game of all time, which coincidentally is the only game that runs crystal clear & clean at 2560 x 1600 with everything cranked to the max.
The newer games won't let me go that high, like for instance Crysis, I am only able to go about 1920 x 1200, with moderate settings... and even then it locks up. But I think that's partly due to running 64-bit Vista. That game is extremely heavy, even though I'm running SLI. Oh well, don't have the cash to dump on that stuff right now so I'll have to suffer.