Phew, quicksave often (BEFORE pressing buttons or entering a room).

Now I am stuck on the third map I think, in that small "two buildings with crates and water" cave. Not really my kind of map but somehow I like it.

This is getting a bit of a reputation for being very difficult, I'd say give it a shot. It's pretty good considering it's from 1998.

This level is hard. Not due to many enemies, shortage of ammo, but because of annoying things: jumping across the lava from a very slim edge, avoiding the next crush trap, balancing on the edge of a board and trying to jump on a crate next to the board, and so on.

So, if you don't like a lot of jumping and you can't stand crush traps with spikes (activated by a button), don't play this level.

There's a fair bit of cheap kills with unexpected traps that require split second reaction and some enemy placements that get you off guard very often. It's best that you save with some frequency and die a lot. Not a bad campaign and the fact you have abundant ammo is a big plus. I recommend it but prepare to die a lot.