Alright. Credit goes to Ryan for the nuts and bots. I only expended it.
In the year 2077, the Earth was suddenly visited by a group of extraterrestrial life forms on a group of space ships that first appeared in the Untied States. The aliens appeared to be somewhat similar to humans with only a few difference. They were accompanied by a large group of their mechanical soldiers and are lead by a male alien named Vexterix Crow (or just Vex for short). He and his kind seek to combine and expand the two worlds together to become whole. Of course, many people of earth did not trust them already, including most of the world leaders. After a bit of conversation with the conventional command and all the world leaders, Vex and his kind were turned down for various reasons. The earth just felt that it is too risky to from an alliance with the aliens. At least not yet. It may also be because Vex simply reuse to answer any questions he's been asked.
Three mouths later, Vexterix came back to earth to declare war on the humans as an act of revenge. His army consist of mechanical soldiers, mechs, and weapons to launch an assault on the people of earth. The alien army was more powerful than anticipated, resulting in a few million deaths and the lost of most of the conventional command and control centers, rendering earth's military scattered and without leadership. The earth was at the vague of being under Vex's control.
Fortunately, the people of earth menage to use a group of allied weapons, artificial beings, and bio suits (that's us; or you can be one of the bad guys) to counter the alien army.
I think the enemies' main forces could be currently occupying Japan as of now, with will be the main setting. What do you guys think?
Also, Vex, the antagonist might actually be a cyborg.