OK, first: I forgot in games this old you had to manually save, so I needed to use cheat codes to get back to the level I was on.
Then, knowing that the lightning yeti was highly explosion resistant, I used the super-nailgun and beat it pretty easily.
The next level is switch hunting in a maze of traps. Nopenope nopenope.
Ok, once again it is reminding be of Oblivion, but each encounter isn’t interesting, and I already have most of the weapons, so I don’t actually see any reason to keep playing unless it is about to get a lot cooler.