These maps date back to years around 1996. I Renewed my oldest maps, which would be an whole episode, but I abandoned it and then I reverted back to it. I converted it to DooM2 and I corrected bugs in texturing and monsters stucked in the walls, inserted some details and joined all 3 maps together.
ID Software, and so...
New from scratch
I don't remeber how long I built the first version, but renew took only few moments.