http://www.blackmesasource.com/
Black Mesa is a Half-Life 2 total conversion remaking VALVe Software’s award-winning PC game, Half-Life. Utilizing the Source engine, Black Mesa will reintroduce the player as Doctor Gordon Freeman, along with the original cast of memorable characters and environments seen in Half-Life. Black Mesa was built and founded on the basis that Half-Life: Source was inadequate as the Source engine port of Half-Life, regardless of the intentions of VALVe Software. As such, Black Mesa was founded to fully reconstruct the Half-Life universe utilizing Source to its fullest potential in terms of art detail, level sizes and code features. This total conversion will not require Half-Life: Source to play - only a copy of any Source Engine game installed on Steam.
-oh yeah baby! I am just waiting to see Portal II
