In 4012, humanity was invaded by extraterrestrials. World governments agreed to pool their resources, as the threat was clearly existential. The scope of the alien technology was unfathomable. Our strongest conventional weaponry barely gave us a chance at survival. The felling of the first enemy war machine was made a holiday almost globally.

It's technology was brought to Space Station Zodiac for research. Eventually the greatest scientists on the planet migrated there, and reverse engineered the craft. From this moment, humanity left behind ships, stealth fighters, and tanks. Our primary method for war became the Nephillim. Massive robots, sometimes human shaped, other times like animals. Equipped with plasma cannons, nuclear rounds, and even massive melee weapons that could combat the Seraphim. Seraphim being the unknown enemy, who's flesh and blood has still not been seen.

Pilots are selected for service on Zodiac based on several qualifications. Only four teams exist thus far, of varying size. The first project, Gemini, consisted of only two Mecha. An attack, and a defense unit each specialized to work in tandem. Twin pilots, with genetic modification that even allowed them psychic communication. Since then, an equal amount of experimental technology has gone into every layer of Zodiac projects.

Now, they are staffing the latest Squadron. Lion Squadron, intended to be the point of the spear. Up until now the units created were meant to defend earth. Theu are our wall, and our shield. Lion Squadron will track the enemy's movements in deep space, and hopefully track down a source to the menace. Or at the very least, reveal the mystery at the heart of the enemy's existence.

Another novel approach was taken to Lion Squadron. Instead of choosing pilots after the Mecha were designed and built, the pilots were chosen from the most exceptional options first. Jet pilots, as well as experienced ground combatants, but even academics and athletes were thrown into the pool. In the end, the final pilots selected were even consulted in the design of their Mechs. These Mechs, state of the art, capable of long term deep space travel. Living quarters, space ships, and base of operations all in one.

Who will answer humanity's call?