I prepared the video of this map for Doom's anniversary, but I wasn't able to get below 18 min until the day.
I spent over 2 weeks for this map, and the spent time is around 35 - 40 hours. This map is one of the best-known maps in Alien Vendetta, and I also like it very much. This is a really difficult map. Although this map is very long, there is no armor in the first half, so any enemies' attacks can have fatal damage. Two soul spheres exist in the part, but I couldn't be secure. In the middle of the map, you can get a blue armor, but I usually consumed the half of the armor in two cyberdemons area. Therefore, there is little room on the health side through the entire map, though a green armor is in the secret. Actually, I got the green armor before going to the yellow key door for a safer run in old run, but I cut it because I lost some seconds. My health was always under 50% in the exit room. The spider mastermind was so troublesome. I was killed by it two times in a row, then my motivation was almost collapsed. I managed to maintain my motivation and get my target which is under 18 min.
All credit for the route goes to Xit Vono. This map is quite complex but very linear, so it is probably unnecessary to change the route. However, I had to consider good selections of weapons well. Vono didn't kill the cyberdemons with two shots of BFG. The reason is probably that the safer way wasn't established when he recorded it. Well, the way itself is easy but some areas are too narrow to kill the cyberdemons safely. I sometimes died or received serious damage in the two cybers area, and blast damage was nearly unavoidable even if I avoided the missiles. However, I was able to save a lot of cells for the way.