Gallery of the Day8 of the Most Annoying Video Game Enemies of All TimeGallery of the Day - RSS 2.0
Poison Headbcrabs - Half-Life 2
When you first start Half-Life 2, you may be a little leery of the headcrabs, but that changes pretty quickly. Once you encounter your first poison headcrab, though, you know you've got something annoying on your hands. These little buggers tend to hide in dark corners or behind boxes and leap out, hitting you and reducing your health to 1 temporarily. They're also much more agile than the normal headcrab, which means you may use up some precious ammo killing them if you aren't careful.