Chain Studios has released a standalone version of an updated Wolfenstein 3D entitled, Wolfram. Included in this game are the first nine levels from Wolfenstein 3D and one secret level. Many of the features spotlighted are graphical in nature such as: per-pixel lighting with bump-mapping and parallax mapping. Also, a local achievement system has been incorporated and you do not need to have the original Wolfenstein 3D in order to play. You can download Wolfram free of charge via ModDB.