They say everything's always bigger in Texas, and yes, that's true.

Especially the sentry guns, and the holes in your body that they'll eventually make.

Meet the Engineer, who has a high IQ and an even higher kill count. His inventions include the sentry gun which kills on sight, his dispenser which refills everybody, and his teleporters, which bring you back to the frontlines in no time. The Engie might be a soft-spoken man, but take caution; maybe the fact that he has eleven PhDs and that he uses them to make sentry guns might be enough to convince you that he might be just as insane as the others after all.