While not a direct rip-off of Mortal Kombat—did MK have monkeys farting poison gas?—the signature gore was definitely there. The advent of the fatality was one of the key features that MK brought to the arcades, and Primal Rage had some of the most brutal seen at the time...performed by dinosaurs and monkeys, no less. The only problem? You had to pretty much hold down every single button on the cabinet and do some crazy joystick motions just to pull them off. In other words, the controls sucked ass. T-Rex ass. And really, is there any other ass that sucks more?