Mh... after reading your comment, I decided to give it a go, and I managed to actually beat the level. Come get some, aprox the same ammo. It is a thing about knowing the level, and where to find stuff, so a bit of trial-error. Took 41 minutes to beat, until I learn that you need to look for transparent buttons (luckily that area wasn't very big).

It is more of a "it is raining and I need to chill out calmly on my flat for a long while" kind of map

I don't know man, after your comment I replayed the map in Come Get Some. I hadn't played it in 10 years (despite having uploaded it here not long, I admit it :p) and here is how much ammo I had left at the end : full pistol / shotgun:14 / chaingun: 115 / RPG: 25 / pipebombs : 4 / shrinkray : 6 / devastator : 90 ; so really there is no problem. There is also quite a few atomic healths and medipacks in the map.

The main problem I had with the map i how a couple of times it's a bit hard to figure out how to open a door; and also that the map is very uneven, especially difficulty (the first map is one of the hardest!)

Mhh.. I am surprised those good mappers where involved: All I found is a map with not much detail, very powerful monsters and a terrible lack of ammo. After spending 10 minutes where I could only try to dodge projectiles without being able to retaliate I had to quit the game in boredrom.

Wow this CBP 3 is Awesome.