This gorgeously illustrated reference provides deep dives on 25 playable Starfinder species, each with thematic player options usable by any character, plus new options for 7 Starfinder character classes. There's also a system for easily creating your own playable species, and a catalog of around 100 thematic nonplayer characters ready to slot into any adventure! A new class, the evolutionist, allows you to transform yourself over time into an eldritch being, mechanized construct, sepulchral undead, or riot of biological potential, each with unique abilities--and drawbacks, should you allow your transformation to grow out of control.