Do you remember the awe you felt first firing up Half-Life 2 in 2004? Now fire it up in 2010. Flat textures, dull lighting. Not quite the same jaw dropping reaction, is it?
Well, check out this mod provided by Filip Victor. It adds HDR lighting, new models, new textures, an upgrade to the Orange Box engine and even some new Steam achievements to the aging PC version of the original Half-Life 2.
You can see examples of the improvements made in the clip above. If you like what you see, you can find instructions on the Steam forums on how to download the mod below.