Lost Coast, a new level for Half-Life 2 showcasing the Source Engine"s HDR capabilities, has finally been released through Steam. Valve states that system requirements for the new level are "very high" and that gamers with older systems shouldn"t attempt to play the level. If the user"s system does not match the requirements, Steam will display a warning, but not prevent the user from downloading.
Check out the discussion in the Neowin forums for player"s experiences with the new level.