Keg

Regular Keg
Kegs are the bread-and-butter light enemy of a lot of levels. They will walk towards you slowly, and then hit you with their front claws in melee range.

They can be identified by their green coloring.

They're slow and don't have much health, but can end you quickly if you stand idly next to them.

Hunter Keg
Rather than using a melee attack, Hunter Kegs fire a straight three-round burst of bullets in your direction.

They can be identified by their white coloring.

(Do they have more health?)

Mega Keg
By far the most dangerous variant, Mega Kegs are larger in size, have much more health, and fire a three-bullet spread three times in your direction for a total of 9 projectiles per burst.

They can be identified by their increased size and red coloring.

To down one without dropping Combo usually requires a secondary weapon or reinforced primary weapon. They do not have a melee attack, and so can be circled at point blank range.