In 2015, two American engineers, Gui Cavalcanti and Matt Oehrlein, set out to build a giant human-piloted combat robot called Mk. II MegaBot that could drive on tank tracks and fire 3-pound projectiles. The robot was pretty cool, they thought, but who would they fight? So they decided to challenged the only other giant piloted robot in the world to a duel. That robot was a 4-metric-ton mech known as Kurata and built by Suidobashi Heavy Industry in Japan. The Japanese accepted the challenge.

Matt Oehrlein and Gui Cavalcanti, co-founders of the robotics company, MegaBots, with giant robots MK2 (left) and Eagle Prime. Matt Oehrlein and Gui Cavalcanti, co-founders of the robotics company, MegaBots, with giant robots MK2 (left) and Eagle Prime. Two years ago an American robotics company challenged a Japanese robotics company to a duel. This long-awaited match between the monstrous robots -- built by MegaBots Inc. of the U.S. and by Suidobashi Heavy Industry of Japan -- will be broadcast on Tuesday via the online steaming site, Twitch. It's billed as the "first ever giant robot fight." "This is a personal dream of mine come to life," says engineer Gui Cavalcanti, MegaBots' co-founder.