This is a mod for Half-Life 1 for the detailed textures in the game, without loss of performance.
Sometimes you need to run games made for Windows Vista on Windows XP. But do not start for a reason ... Not because the game was built for Windows Vista, but for DirectX 10! With this add-on kindly offered by KM-Software, we could play with the most advanced games in the now old Windows XP! This is the full version, not the RC2, so be quiet for errors.