Salvete! I started playing Endless Space 2 recently and I was struck by inspiration. I had always wanted to play and Endless Legend on tabletop but could never quite get it right, but with Endless Space and Starfinder I think that this could work. I've made some of the Endless Space 2 races. I left out those that I felt either weren't important enough to make in my first draft (i.e. most Minor Factions) or weren't suited to being PCs (i.e. the Riftborn or Unfallen). For those who are curious about the Endless games, here are some links
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Without further ado
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Horatios 4 HP
Horatios are Medium-sized humanoids with the Human and Horatio Subtypes
+2 Con, +2 Cha, -2 Int Horatios are are physically and aesthetically superior so as to reflect the Horatio Prime's perfection but are mentally stunted so as not to lessen the greatness of Horatio Prime
Perfect Display A Horatio must always be ready to share his glorious perfection to those eager to bask in it. Once per day, so long as there is an ally within 10 ft, a Horatio may roll a single attack roll or Skill check twice and take the higher result.
Perfect Education All Horatios are given intense training from a young age to ensure that their perfection is not squandered. Horatios receive Skill Focus as a Bonus Feat at 1st level.
Perfect Eyes Each Horatio sees more than any other, just like their glorious creator. Horatios have Low Light Vision.
Perfect Obedience Horatios were made to serve and are thus loyal yet docile. Any order to attack the person they recognize as their supreme leader (typically Horatio Prime) is treated as an obviously self-destructive order allowing them to refuse even when under the effect Dominate Person or similar abilities. However Horatios suffer a -2 penalty to all saves against all Charm, Compulsion, or Mind-Affecting effects.
Suggested Classes Envoy, Operative, Solarian
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Lumeri 4 HP
Lumeri are Medium-sized humanoids with the Lumeris Subtype
+2 Dex, +2 Cha, -2 Wis Lumeri are quick on their feet and with their words, but are easily swept away by their passions.
Daily Business A lifetime of bartering, double-dealing, and skullduggery have left the Lumeri with a wealth of social graces. Lumeri receive a +2 to Bluff, Diplomacy, Intimidate, and Sense Motive checks.
Dirty Business Lumeri evolved a hardy immune system thanks to ancient aquatic predators as well as some modern ones as well. Lumeri receive a +2 to Fortitude Saves against Disease and Poison.
Fishy Business Lumeri are a traditionalist people that still remember their roots, particularly their evolutionary ones. Lumeri have a Swim Speed equal to their Land Speed and can breathe in water as easily as they can in air.
Shadowy Business Lumeri are good at working in the shadows, whether it's in a deep sea trench or a back alley. Lumeri have Darkvision out to 60 feet.
Suggested Classes Envoy, Operative, Solarian
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Sophons 2 HP
Sophons are Small-sized humanoids with the Sophon Subtype
+2 Dex, +4 Int, -2 Str, -2 Wis Sophons are the brightest minds with nimble bodies to help them build precise tools but they are small, frail, and utterly reckless.
Always the First The Sophons were always the first to make big discoveries and even bigger mistakes. Sophons receive a +2 to Computers, Engineering, and Physical Science checks.
Always in Suits Sophons compensate for their frail bodies with advanced exosuits that they extensively customize. Sophons are automatically proficient in Light Armor and reduce the Armor Check Penalty of any armor they wear by 1 so long as they have had down time to custom fit it to themselves.
Suggested Classes Mechanic, Operative, Technomancer
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The Cravers 6 HP
The Cravers are Medium-sized humanoids with the Craver Subtype
+2 Str, +2 Con, -2 Cha The Cravers were built for one purpose, to destroy planets over, and over, and over.
Military Grade Arms The Cravers were built to bear arms, so the Endless gave them an extra pair. The Cravers may wield and hold up to four hands worth of weapons and items but do not gain additional attacks from doing so.
Military Grade Resilience The Cravers bear a hunger that makes all other burdens seem trivial by comparison. The Cravers receive a +1 bonus to all Saves and an additional +2 bonus to all Saves against Fear effects.
Military Grade Targeting Systems The Cravers cannot let any potential source of nourishment escape them. The Cravers have Low Light Vision as well as Darakvision out to 60 feet.
Suggested Classes Soldier, Soldier, Soldier
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Vodyani 4 HP
Vodyani are Medium-sized humanoids with the Vodyani Subtype
+2 Str, +2 Wis, -2 Dex Vodyani are strong in both body and soul, but their artificial bodies are overly elaborate.
Endless Bodies Vodyani have cast aside their mortal form to rise Endless. Vodyani are considered both humanoid and construct (whichever is worse) and receive a +2 bonus on all Saves against Mind-Affecting and Sleep effects unless those effects specifically target constructs. They are also immune to Disease, Poison, Suffocation, and Vacuum.
Endless Power The Vodyani are one with the mystical power of Dust. Vodyani may cast Light or Psychokinetic Hand as Spell-Like Abilities At Will.
Endless Worship All Vodyani are taught to how to properly praise the Endless for their new bodies. Vodyani receive a +2 bonus to Culture and Mysticism checks and are always considered Trained in Mysticism.
Suggested Classes Mystic, Solarian, Soldier
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Cultural Feat and Skill choices for Humans
Humans have a rich variety of cultures that have spread across the galaxy, each with their own preferred vocations and ideologies. The following are suggestions for what to choose as your Human Feat and Skill based on your culture.
Imperials are typical citizens of the United Empire of Raia. They are a nationalistic and hard working people with a strong belief in the superiority of industry.
Suggested Feats Skill Focus, Toughness
Suggested Skills Engineering, Perception, Profession
Sheredyn are the militant faction within the Empire that seeks to either convince Emperor Maximilien Zelevas to take a more militant and authoritarian approach to governing (which is saying a lot) or simply replace him with a stronger Emperor.
Suggested Feats Diehard, Weapon Focus
Suggested Skills Athletics, Intimidate, Piloting
Mezari are people who are eager to return to the old peaceful and technologically minded ways of humanity before their civilization crashed on Auriga and were forced to claw their way back to the stars over countless generations.
Suggested Feats Improved Initiative, Skill Synergy
Suggested Skills Computers, Engineering, Physical Science
Pilgrims are pacifists and spiritualists who gave up on ever seeing a free thinking Empire and fled to the stars to find hints of the Endless.
Suggested Feats Iron Will, Mystic Strike
Suggested Skills Life Science, Mysticism, Survival
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As a final note, I would like to say that I currently do not plan to make the Riftborn (they're too Vorlon-ish) or the Unfallen (they're too big and unmoving) from 2 nor do I plan on making any of the races unique to 1 (the lore is just too threadbare) but that if anyone has a good arguement for why I should I'll at least hear them out. Remember, if you have questions, suggestions, or requests just say so.