This is a redux from memory of the first map pack I ever made. I started mapping back in 1998 for Duke Nukem 3D with a map pack called Operation Blitzkrieg, which contain three SP maps and 2-3 DM only maps (I can't remember exactly now). I had also released a single map a bit earlier which exists today in this episode as the motel level, but instead of a motel it was a house. I lost the original OB map pack and redid it in 2011 as a standalone episode of its own, with an additional final map made from scratch which served as the final level.
The maps aren't particularly detailed, although they weren't too bad for the time. There is a couple of HOM effects with doors which never existed in earlier source ports which I would like to fix if I ever did another Redux version similar to my GZDoom map HUD "Spawn." There's also not a lot of rocket ammo unless you do some secret hunting. The final boss battle does not make much sense from an environment perspective, either. And like many of my earlier maps, they lacked variety in vertical heights.