Swarming enemies
Generally seen in post-apocalyptic games, the enemies who tend to stick in packs are annoying to deal with. They might not have the upper hand in terms of hit points or attack points, but they can certainly overwhelm you with just their numbers which can become extremely daunting in the heat of battle. A good example of this enemy type are the bug swarms in Half-Life.
Share Your Thoughts Below (Always follow our comments policy!)