SPACE FIGHT! is easily extendable with new factions. The core boxed set comes with six playable factions, each with it’s own flavor.
Union
The Allied Union of Worlds maintains a naval and exploration fleet know as the United Space Force (USF). The remit of this fleet is to push the frontier of exploration, keep the peace, and expand the Union. While the Union officially maintains that it is at peace with all other known civilizations, this is not strictly true. Union vessels range from destroyers, battleships, and carriers tasked with defending Union worlds to long range scout ships and enormous cruisers capable of multiyear missions far away from Union space.
Pirates
There is a wide variety of civilian craft flying the spacelanes of the galaxy, including transports, liners, cargo haulers, tugs, yachts, and more. Many are built by large corporations, such as the Chen Zua corporation. But notable amongst these are dangerous pirates and raiders who obey no law.
Ogron
The Ogron Twins, the two homeworlds of the Ogron race, are a permanent thorn in the side of the Union Worlds. Ogrons ignore the Union, doing exactly as they wish—plundering, slaving, and worse. While Ogron is not a particularly organized world, and does not have a notable Navy of its own, individual Ogron pirate and slaver ships can be formidable. As yet, the Union does not have a formal policy regarding Ogron activity outside the Union Worlds.
Ogron technology is blunt and powerful; they manufacture a wide variety of blasters and concussion missiles, their preferred forms of weaponry.
Borian
A heavily industrial faction which hails from the 47 moons of a mighty gas giant, Borian ships tend to be sturdy and practical. Boria does not maintain a navy, and excels in mining and industrial ships, as well as ion technology. As a full member of the Union, there is some technological sharing between the Union and Boria.
Spartan
The Spartans—their homeworld may be colloquially called Sparta by earthlings, but its name is actually Azatbar—has a small empire of a handful of colonized and conquered planets. Spartan space is located within the non-contiguous area which contains the various Union worlds. The situation between the Spartans and the Union is best compared to a cold war.
The Spartans maintain a powerful navy named the Royal Spartan Armada, with formidable destroyers, battleships, and other military ships.
Vendalyr
Vendalyr is the most technologically advanced of the factions in SPACE FIGHT! Because of this, there is little technological sharing between Vendalyr and the Union, but occasional exchanges do take place; for example, the Yuku Kalush-class destroyer carries four Union-built Razorback-class fighters. Vendalyr is a peaceful faction, highly scientific, and are hard to provoke, but when they need to defend themselves, they are very formidable.