Each race (and possibly pre-made creatures) will have its own unique Lore. As of now, the most that is known about almost all of the races is a few details or an incomplete back story.
As more is revealed, Lore for the individual races will be added below.
A highly advanced, militant collectivist and authoritarian regime of Apes. The Apex were once very similar looking to the Humans. However, the Apex society as a whole underwent a process known as the Vestigi-Evo Process (VEP) and devolved physically to apes but advanced intellectually. The Apex are ruled by a figure of extremely high authority who goes by the name of 'Big Ape'. The Apex have spread across the stars primarily by settling various research facilities on many planets, but most, if not all, of the research facilities are abandoned but a few highly-paranoid guards and in some cases victims of the feared 'Ape Flu' are to be found. Steer clear of infected Apes under any circumstances, and it is highly recommended than none other than any MiniKnog Officials enter the facilities, or risk the death penalty.
The Apex are at the cutting edge of modern technology, with one of the main focuses of their society being the pursuit of greater technological advances.
"Big Ape" may have used the USCM prisons as a source of free scientific experiments, or even used the prisons as concentration camps. As posters with him on them can somtimes be found around the prison stating "There is no need to be upset". This may also explain why the prisons have been abandoned and no guards are to be found anywhere, if the guards were not human, then maybe they could have been apex. The "Ape Flu" may have broken out one these prisons, possibly originating as a human virus.
This may be explained with a historical analogy - the Pilgrims and native Americans for example. The Pilgrims had carried smallpox overseas and infected the native tribes, leading to massive outbreaks. The same could have happened when humans came in contact with the Apex. A human who carried a simple desease (such as the flu) could have proved deadly to the Apex. This could explain why the "Research" Labs are abandoned by the Apex as well.
A society of bird people, Avians are a highly religious race who worship their deified progenitor Kluex. Thousands of years prior, a race of advanced beings took pity on the dying vestiges of the underdeveloped Avian population, took several members and gifted them with advanced knowledge. Among those chosen was an Avian named Kluex who went forward to create the mighty civilization that survives to this day.
The Avians use a combination of rudimentary tools and their more modern technology to create fearsome weapons and equipment, however their progress is all owed to the unknown alien race.
More in-depth background can be read here : Avian Lore.
A young race of sentient humanoid plants that are surprisingly highly aggressive and cannibalistic in nature, the Floran are masters of salvaging captured technology and use that ability to expand and thrive. They are considered by many of the other major races to be a threat to the galaxy, more so by the Avians who had unintentionally assisted the Florans in escaping their homeworld.
Floran technology is primitive and basic. All of their advanced technology is stolen and salvaged from other races, usually after they had eaten the crew.
The Glitch are a race of robots, the remnants of an experiment of a long forgotten alien race. All other robotic civilizations eventually destroyed themselves, whereas the Glitch became inadvertedly stuck in the medieval era of civilization. They are entirely unaware of their origins and act as any other sentient being would in the medieval time period. However, some of the Glitch will experience a glitch when created that removes the error that blocks their higher knowledge. These Glitch are often hunted down and executed by their kind for being insane.
The overwhelming majority of Glitch society remains stuck at a medieval level of technology, using swords, bows and arrows. However, the few Glitch that escaped from their homeworld and moved to the stars possess highly advanced technology.
Despite being a young race, humans are a highly advanced species that progressed quickly, both socially and technologically. Humans were the first of the major races to research and conduct space travel, however humanity's expansion into the stars was painfully slow. As Earth's resources were on the verge of depletion the superpowers of Earth fought for the resources of the other planets of the Sol System. In an unexpected turn of events, as a war was being fought over Mars, Earth was destroyed by an unknown creature with large tentacles, decimating the hastily unified nations of Earth and scattering the surviving humans into the depths of space. Human organizations such as the U.S.C.M survived the destruction of Earth.
Technologically, humans are the second most advanced civilization behind the Apex, posessing cloning technology and FTL drives.
The Hylotl are an aquatic race of peaceful people. They pursue beauty, perfection, and culture and enjoy spreading these ideals to other races. They are pacifists.
Their technological level is unknown, however they are capable of conducting space travel.
The Novakid are a civilization of, as one human astronomer inelegantly put it, "interstellar gas-bag people". They evolved from the remnants of a dying star. All information on Novakid history has been lost to time as the Novakid, despite being on average more intelligent than most members of the major races, have short attention spans which severely restrict their technological advances and historical records. Most new technology invented by the Novakid is forgotten within two to three generations.
Due to the Novakid's short attention span and reluctance to record anything of significance, Novakid technology level changes very often, going from primitive swords and armour to space ships and guns back to swords in as little as six to eight generations.
The Penguins are an elusive race, not much of them are seen throughout the galaxy (although when other races do meet them it usually ends up in conflict). The origins of the penguins have been confirmed to be from a Brown-Dwarf System, a rare star that can be as cool as room temperature. Only now are records of the Penguins being uncovered as their small outposts in the depths of Ice-Giants are being uncovered.