Here is the full list of all 10 Prey: Typhon Hunter achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
You won 50 matches as a mimic.
You won 50 matches as Morgan.
You mimicked 50 unique objects.
You picked up 50 unique objects that aren't mimics.
You survived an entire match without mimicking anything.
You successfully killed Morgan while mimicked as a weapon.
You won the round by knocking Morgan out with a mimic attack as time expired.
You killed 3 mimics within 20 seconds after picking up a Psychoscope Chipset.
You won a match as Morgan using only the wrench.
You killed a mimic within 15 seconds of match start.