Your alone. 50 years ago, monsters roamed the earth, so these huge mechazoids where build in order to protect Earth. But the monsters possessed the robots, killing off many of the humans on earth. Survival is tough. The #1 rule in this world is to not to go out in open fields, because that's where the giants roam, but you broke that rule. In the distance, you see the first mech ever created, Ecuador-V91. It obviously seen you... wdyd.