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