Three levels with 3 Anvil patches to change textures to suit your preference.  Also includes Spoilers for the four (counting original) maps/textures/mediums.  These maps/levels are so complicated, convoluted, twisty, tricky, complex, switch oriented, etc., etc., with ammo hidden everywhere & Bobs so deadly . . . well you've got to see it to believe it! Highly recommended for solo play & boy, good luck for Net folks!  WHAT FUN! Should support quite a crowd of foolhardy players.  Download now!  (Note to Bernie, throw in some terminals, give us a mission!