NocturnesRequiem

Also you can check out halflife2.filefront.com there are alot of mods building about for half life 2 now, one of them is called the Substance mod, its aimed at those who didnt enjoy the ending of half life 2 and is meant to add in more elements to the story of the game. I myself Havent reached the end yet so I havent checked it out personally, but i hear from alot of people in forums and also in CS:S games that its quite well done.