666 v1.8 is for version 1.3. It has 3 levels and the file is 253KB in size. The file name is 666.zip. It was released on January 2, 1997.

666 has fair level design and gameplay. You should skip this one if you are easily offended. But what am I saying, your playing Duke Nukem right? Still, read the Warning text doc before loading. Level 1 starts in an abbey courtyard. Your mission is to find all the switchs to be able to move on the the next level. It's okay but gets tedious. Be sure to look behind or in everything possible, some switchs are well hidden. It took me 42 minutes to complete this level. Level 2 starts in the hidden wing of the abbey after an earthquake or something has struck it. I found the keys with no problem but had trouble finding the blue keycard slot. I think the author(s) were being a little too tricky with this level. Level 3 is the catacombs below the abbey. This level is just a pain. I rate this TC as fair with 2 out of 5 stars.