[incision]

>Anyone has a idea of why the hell someone would build a bipedal war machine?

Off the top of my head...

1.) I'd have think there's something to bipedal locomotion considering the evolutionary success it has had.

2.) We're bipedal. As long as pilots we'd recognize as human are involved, having an analog to the kind of movement they've necessarily trained a lifetime for seems sensible.

[NegativeK]

What are you using to define evolutionary success? Most pedal species aren't bipedal, and the more populous species don't even have legs.

[jlgreco]

Evolution does not necessarily always find the best solution. It can get stuck in local optima: http://en.wikipedia.org/wiki/Rotating_locomotion_in_living_s...