Before our world had even cooled, a dire threat faced the thousand races├óÔé¼Ôäó that inhabited the outer edge of the galactic core. The Core, the massive bejeweled cloud of energy that was the center of our galaxy, had begun a fatal climax to a million year old countdown. The stars of the Core are much closer together then the outer arm├óÔé¼Ôäós, and this allowed Slower then light travel ship├óÔé¼Ôäós to reach other star├óÔé¼Ôäós in only a year, or at best a few month├óÔé¼Ôäós.
The Galactic Senate formed and ruled semi-peacefully for thousand├óÔé¼Ôäós of year├óÔé¼Ôäós. Empire├óÔé¼Ôäós grew and faded, and the Core seemed to last forever. However the energy coming off each star fed into the others, making the Core a hot bed of radiation. Race├óÔé¼Ôäós that didn├óÔé¼Ôäót cope, died out, but most survived and continued on with the status co. The stars though, they began to age faster, burning there hydrogen at an increased rate.
One by one the star├óÔé¼Ôäós began to supernova, and these massive energy├óÔé¼Ôäós caused other star├óÔé¼Ôäós to supernova as well, creating a crescendo of energy that wiped out the Core in one massive, slow motion explosion. The race├óÔé¼Ôäós panicked, but bogged down by bureaucracy and bickering, no major evacuations took place. Some race├óÔé¼Ôäós escaped in tiny ramjet ships, but most where consumed by the deadly wave of gamma radiation that spilled form the Core.
The outer race├óÔé¼Ôäós, the ones that weren├óÔé¼Ôäót powerful enough, economically or politically, to force there way into the rich hot bed of the Core, saw the holocaust that consumed thousand├óÔé¼Ôäós of race├óÔé¼Ôäós. The charismatic leader of a race known as the J├óÔé¼Ôäóokall took quick control of the Outer Senate and organized a massive exodus, before the wave of Gamma radiation overcame them. It took fifty year├óÔé¼Ôäós, and they lost many of the inner race├óÔé¼Ôäós, but the majority of the Arm sector escaped.
The Arm sector was facing towards the third arm of the galaxy, the races of the other two Arm sector├óÔé¼Ôäós have never been contacted by this one. There fate was never found, and the fleeing race├óÔé¼Ôäós didn├óÔé¼Ôäót care enough to send scout├óÔé¼Ôäós around the cloud of radiation.
Even though the Exodus Fleet, or the EF, was using ramjets and flying at demi-light-speed, the Core Explosion still gained. As thing├óÔé¼Ôäós looked grim, a amazing mind from a race of famed thinkers found the secret of hyperspace, and how to travel faster then light. The EF suddenly started to gain ground, and headed outwards, towards the Cloud of Magellan, and possible to Andromeda. Where ever they needed to go.
The EF formed a police force the keep malcontent├óÔé¼Ôäós under control, and called them the Guardian├óÔé¼Ôäós. Only a few minor wars occurred, and some race├óÔé¼Ôäós where confined into radio silence, forbidden to leave there World-Ship. Those ships, named the Outcast├óÔé¼Ôäós, clustered around the network of ships of the EF. Some ships exploded like miniature sun├óÔé¼Ôäós, fusion bomb├óÔé¼Ôäós strapped to there hull set off. Million├óÔé¼Ôäós perished as the Guardians kept the peace.
A minor scuffle happened at the outer edge of the Galactic Arm. It involved a race of semi-evolved, but very stubborn and pugnacious, apes. They joined up with the fleet after a minor war. When they saw the explosion shining through the dust cloud├óÔé¼Ôäós near the center of the galaxy, the negotiation├óÔé¼Ôäós where quickly over. The humans stuck to the dank subsections of the most charitable race in the EF, the Shofixti. The human├óÔé¼Ôäós, pushed to new level├óÔé¼Ôäós of xenophobia and general anti alienisms, sulked and plotted.
The Shofixti simply shock there head and subdued the human uprising├óÔé¼Ôäós with as little violence as possible. After a few centuries, after the EF had cleared the edge of the Galaxy, the humans and the Shofixti had grown so used to each other, that they barley noticed any difference between them. Aside form the fact that the human├óÔé¼Ôäós had a amazing lack of gill├óÔé¼Ôäós, stinkers or compound eye├óÔé¼Ôäós.
The EF has been running now, fleeing between the fast gulf between the Milky Way and Andromeda, for exactly twenty nine thousand years.
Ten years ago, the EF was waked up from a semi-stagnant peace to find they had reached Andromeda. Now they are in├óÔé¼┬ª for the fight of there lives.
Two Race├óÔé¼Ôäós, the Exodus Fleet and the Xeno├óÔé¼Ôäós.
Bizarre Alien worlds: Mapmakers, use your imagination, NO TERRIN STYLE├óÔé¼ÔäóS!
Ridiculously powerful weapons: Think up some cool technobable here.
Plot line written by ME!

(This is either a pro or a con, depending on how annoying you think I am)
What do ya think?