Wolfenstein Collection is a mod for registered Wolfenstein, made by MCS. It was released on November 4, 2000.
It features 30 levels played in a seamless flow (26 regular, 4 secret "challenge" levels) though it is firmly rooted in original Wolfenstein.
Many sounds and music chunks were changed, mainly coming from Blake Stone. Some new graphics were added as well. Blood was removed from all guards when shot, but was retained on bosses.
The status bar utilized digital-looking letters, giving a more temporary quality.
Level design, though of high quality, is quite maze-like in places and quite difficult.
Its source code later saw release, and a number of mods exists using this mod as their base.