* GoddamnBats: Gremlins. They're not particularly difficult to kill, but they steal food with every hit. Run out of food and you instantly die. This is especially annoying early on when you're trying to balance out buying food with upgrading your equipment. Oh, and you can't loot the stolen food off their bodies when they die.
* SoBadItsGood: The game's plot is so random that it's laughable.