Here is the full list of all 40 XCOM: Chimera Squad achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Complete all versions of each Faction’s Takedown mission over multiple campaigns.
Buy 20 unique Scavenger Market items in a single campaign.
Complete a mission with only one Agent left standing.
Use every type of Breach point.
Complete a mission without killing a single enemy.
Complete an encounter by only dealing damage with melee attacks.
Clear an entire encounter during the Breach turn.
Win the campaign on Impossible difficulty.
Relocate the same unit with Shelter and his ghost in one turn.
Hack an enemy Android with Patchwork and trigger Self-Destruct.
Use Claymore to detonate a Shrapnel Bomb with another explosive.
Use every Agent in at least one mission.
Move a VIP with Shelter’s Relocate and Torque’s Tongue Pull.
Win the campaign.
Reach max rank with all Agents in a single campaign.
Complete the Gray Phoenix Investigation.
Have Rank 3 Field Teams in all nine districts.
Complete every Spec Op at least once in a single campaign.
Complete 20 Assembly Projects in a single campaign.
Capture a Praetorian.
Fully upgrade an Android.
Use Verge to do 10 or more damage with one Mindflay.
Complete the Progeny Investigation.
Replace an Agent mid-mission with an Android.
Use Torque to Tongue Pull an enemy into poison.
Use Zephyr to hit 3 or more enemies with one use of Crowd Control.
Launch a mission with no human agents in the squad.
Capture a Sorcerer.
As Godmother, activate Overtime and down an enemy on both turns.
Unlock all Field Abilities.
Complete all of one Agent’s class training.
Kill an enemy with Axiom while Berserk.
Have 8 Agents in the squad in a single campaign.
Use Blueblood to hit 3 or more enemies with one Phase Lance shot.
Equip an Epic Weapon.
Complete the Sacred Coil Investigation.
Have Kinetic Armor on all 4 squad members at once.
Capture a Ronin.
Complete an objective with an action from Terminal’s Cooperation.
Complete the tutorial.