Black Mesa source is a mod of half life 2 that is a remake of the original Half-Life. And it's awesome, coming in 2009.
I was following the website (www.blackmesasource.com) for about a month or so when suddenly I saw something that made my hair stand on end: THE FIRST TRAILER IS OUT!!!
It is unbelievable awesome.
It makes the wait for the game all the more hard! This mod is GOLD!