Mutated, mindless prision guards with a large chaingun in place of an eye. Such creatures are incapable of following anything but the most simple of orders. Lack of ears means they're also deaf, so all communication must be done through hand signals. Much better just to starve them then let them run wild when needed.
This one was a sketch for a FPS that I had an idea for a few years ago, about a prision break on an alien planet. Maybe one day I'll pick it up again.