Humans beware. The great robot revolution is nigh, and builders of combat robots have done us no favors by creating machines whose sole function is to destroy. Way to go, guys. But, on second thought, maybe it's for the best that these "combots" exist, and are still obeying their owners by fighting battles — exclusively with each other — inside a giant, bulletproof pen at the annual International RoboGames. This gives us an opportunity now to study their moves — before they launch their surprise attack on the human race. Combots have advantages such as brute force, whirling blades, super-sumo skills, and general imperviousness to pain. There are even androids that perform kung fu (shudder). But by observing them in action now, we can start formulating our defense strategy ahead of time. Thanks, RoboGames, for giving us this opportunity for the past decade.