A/N: I do not own Halo, Warhammer 40k, X-Com, StarCraft, or Mass Effect. They are all owned by their respective owners/companies. Any OC's are mine however. Read and enjoy!

Chapter 0- Prologue

It was the sudden appearance of a Warp Storm at the Gemini System's outer edge that first caught the attention of the Imperium, and not just the Imperium...

After hundreds of years under the neglectful watch of the Imperial Guard, nearly every force in the galaxy would descend upon the planets of Gemini, bent only on domination and victory.

Four races had long dwelled in there: The Imperial Guard, it's supposed rulers, the Ork tribes of Gemini II, which the guard had never successfully put down, the Necron, who had slept undisturbed for untold millennia beneath Gemini III, and the Zerg that rested atop the food web on Gemini V, a terrifying and ruthless amalgamation of biologically advanced, arthropod aliens. Dedicated to the pursuit of genetic perfection.

Where the Chaos Space Marines came from, or how, none can say. Did the Warp Storm bring them...or did they bring the Warp Storm? Both appeared suddenly on Gemini IV and in an eye blink half the system's Imperial forces were gone, killed or claimed by the madness of Chaos.

In quick succession, the others flocked to Gemini. The Space Marines, the Imperium's super-soldiers, descended on Gemini II, planning to finally cleanse the system both of the troublesome Orks and the Chaos Space Marines, their sworn mortal enemies.

The Tau appeared next, not far above, on one of the planet's moons. In the interests of protecting its ordered Empire from the effects of human folly, the Tau came seeking to contain the Warp Storm and, in so doing, expand their territory's border. On their moon they built a mighty fortress, and there forged a space cannon capable of interplanetary devastation.

Among the wastes of Gemini III, the Necrons, perhaps awakened by the disruptive forces of the Warp Storm, slowly massed their lethal legions. I quick response, Webway Gates, long unused, flickered to life, and Eldar poured forth, ready to battle their dark, death-dealing adversaries.

Meanwhile, in the shadow of an ancient portal gate, the Dark Eldar slipped stealthily out of the murky depths of the Webway. They would be like carrion birds, flying above the battlefield, and when all were weary from the fight, make the battlefield into a feasting ground.

Next to arrive were the Sisters of Battle, holy maidens and keepers of the God-Emperor's faith. They had come to cleanse this system of corruption and filth. Their faith left them fanatical, unafraid of death and zealous in their cause. Nothing here was clean, all must be purged.

Over another of the system's moons, came the Covenant. Perhaps attracted by the Warp Storm as a sign of their supposed Great Journey, they seek to glass all that dare block their path. The Forerunners had given them divine providence as the Chosen Ones, and they would not be denied their Ascension.

Next to arrive from a nearby Mass Relay were the Citadel Fleet, who settled upon Gemini V to properly investigate the disturbance of the Warp Storm, and, perhaps, scout out the others for potential membership within the Council.

Seemingly out of nowhere, near a moon above Gemini III, settled a Temple ship of the Ethereal Collective, with the goal to subjugate the Gemini system while acquiring some of the finest, most psionically-gifted specimens among those vying for control of the planets.

With the radial disturbance of the Warp Storm, it brought forth the arrival of the Protoss, Psionic beings representing "purity of form" to land upon Gemini V to attempt to purify it of the Zerg Infestation.

The last to arrive, and perhaps most to be feared, was the Tyranid Hive Fleet, a collective of monstrous super-organisms bent only on survival and propagation. The Gemini system was merely the next in the long line of worlds they had already consumed. Now, war rages anew, and only the victorious may write their history. Only the victorious will claim the planets of Gemini.

A/N: Yeah, I pretty much ripped off the opening cinematic to WH40k: Soul Storm, but it was the best way I could think to do this prologue, and besides, pretty much using SS as the setting for this, so I feel it fits. I always strive to improve, so be sure to send me a review and tell me what you think and what I can improve upon in the future.