Here is a listing of all the different enemies that can be found in the expansion pack Duke: Nuclear Winter for the game Duke Nukem 3D.
Common enemies[]
Assault Trooper/Assault Captain[]
The most obvious way to make anything look festive is to stick a Santa Claus hat on it. Which this enemy has done.
Enforcer[]
It may have a pair of reindeer antlers, but this particular creature will be trying to stop you in your tracks.
Pig Cop[]
More Santa hats to go around. Well, the North Pole must be full of them, so why not?
Grunt[]
A new enemy. A member of the Feminist Elven Militia (see the pun in the acronym there?). They wear black sports bras and white camouflage pants, and carry dual handguns.
Groan[]
A new enemy. A member of the Feminist Elven Militia. This particular elf wears a blue suit with no pants, and sports dual shotguns.
Snowman[]
A new enemy. Its name may not be known, but it's certainly frosty to you. As the name suggests, it's a large snowman, complete with a top hat. It throws snowballs at you in much the same way that a zombie throws parts of itself.
Flying Frosty[]
A new enemy. It bears a striking resemblance to the Assault Commander, except it's a snowman sitting on a large floating holly wreath (ouch!) and it fires snowballs at things it doesn't like (mainly you).
Fairly obviously, this enemy is little more than a sprite change for the Assault Commander.
Frosted Battle Mobile[]
A new enemy. It's a snowman on a snowmobile and it fires snowballs. Snow snow snow.
This enemy replaces the Pig Cop Tank, and appears to be nothing more than a sprite change as hitting the back of it will cause it to detonate, even though it has no self-destruct button.
Protozoid Slimer[]
Identical to the one in Duke Nukem 3D, and one of only a few to not be changed.
Shark[]
Identical to the one in Duke Nukem 3D, and one of only a few to not be changed.
Turret[]
Identical to the one in Duke Nukem 3D, and one of only a few to not be changed.
Boss: Santa Claws[]
The jolly fat man himself has been brainwashed and now he's after Duke! His punishment for being naughty has gotten a little more severe: he wields a quick-fire rocket launcher. He's also unnaturally agile, fast-moving and jumps all over the place - perhaps the magic has upped all his stats. Shoot him until he dies to save him, apparently.