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