Here is the full list of all 35 The Expanse: A Telltale Series achievements.
Complete Episode 5 of The Expanse
Complete all Episodes of The Expanse
Complete Episode 4 of The Expanse
Made it past the Drones in the Mines without being caught
Complete Episode 3 of The Expanse
Complete Episode 2 with all Scavenge Items
Complete Episode 2 of The Expanse
Listen to Maya’s Music
Give Vigil the Mushroom Powder
Give the Twins some Medicine
Discover the truth about Vigil's past
Complete Episode 1 of The Expanse
Found all Scavenge Items in Episode 1
Find all Data Logs in Episode 1
Complete Episode 2 with all Data Logs
Complete Episode 3 with all Scavenge Items
Complete Episode 3 with all Data Logs
Complete Episode 4 with all Data Logs
Complete Episode 5 with all Data Logs
Found a Laser Crystal for Virgil
Give Khan a Gift
Give Cox the Bottle of Scotch
Rayen kills Arlen
Help Virgil overcome his panic attack
Keep Maya alive
Keep Khan alive
Keep Cox alive
Find all the Scavenge Items in the game
Find all Data Logs in all Episodes
Keep All Possible Crewmates Alive
Play three chess moves against Arjun
Open the Secretary-General's safe
Practice meditation at the Buddha statue
Get the votes to oppose Mendez’s motion on the first try
Complete the Archangel story