I have the BFG 9000, it's not like it's hard.

But this map was so huge, and there was probably, 20 different teleports. The only bad monster area, was a spot where they just kept teleporting in. I had it on the easiest setting too.
I don't know what the time limit is on the clock in the game, but I went way over...mainly just walking a lot, and trying to remember where all the TP's went to.