Inside Starfinder Alien Archive, you'll find the following:
Over 80 bizarre life-forms both classic and new, from the reptilian ikeshtis and energy-bodied hallajins to robotic anacites and supernatural entities from beyond the realms of mortals.
Over 20 races with full player rules, letting you play everything from a winged dragonkin to a hyperevolved floating brain.
New alien technology to help give your character an edge, including weapons, armor, magic items, and more.
A robust NPC-creation system to let Game Masters build any aliens or creatures they can imagine.
New rules for magical monster summoning, quick templates to modify creatures on the fly, and more!