Full list of all 88 XCOM 2 achievements.
The base game contains 50 achievements, and there are 4 DLC packs containing 38 achievements.
Beat the game on Commander+ difficulty without buying a Squad Size upgrade
Beat the game on Commander+ difficulty by July 1st (July 15th for War of the Chosen)
Beat the game on Commander+ difficulty in Ironman mode
Skulljack each different type of ADVENT soldier (does not have to be in same game)
Beat a mission in June or later using only Rookies
Kill an enemy with every heavy weapon in the game (Doesn't have to be in the same game)
Beat a mission on Commander+ with a squad composed entirely of soldiers of the same class (but not Rookie)
Cause an enemy to fall to its death
Evacuate a soldier whose bleed-out timer is still running
Beat the final mission using only conventional gear
Overthrow the aliens on Commander difficulty
Overthrow the aliens on Legend difficulty
Beat the game on Commander+ without losing a soldier
Overthrow the aliens at any difficulty level
Create the Commander's Avatar
Complete the Avatar Autopsy
Beat a Retaliation mission with no more than 3 civilian deaths
Recover the Psi Gate
Recover the Forge Item
Get all of the continent bonuses available in a single campaign
Build a radio relay on every continent
Kill an Avatar
Build a facility in every Avenger slot
Kill a Sectopod on the same turn you encounter it
Hack and take control of a Sectopod
Completely upgrade a beam weapon with superior grade weapon upgrades
Sell goods worth 1000 supplies to the Black Market (Can span multiple games)
Kill 3 enemies in a single turn, with a single soldier, without explosives
Sabotage an alien facility
Kill an enemy with a hacked turret
Kill 500 aliens. (does not have to be in same game)
Build the Shadow Chamber
Earn a second tier hack reward
Upgrade a facility
Build Resistance Comms
Build an experimental item in the Proving Grounds
Kill a Berserker in melee combat
Recover a Codex Brain
Skulljack an ADVENT Officer
Win a multiplayer match.
Kill a Viper who is strangling a squadmate
Recover the Blacksite Data
Make contact with a region
Apply a PCS upgrade to a soldier
Upgrade a weapon
Kill a Sectoid who is currently mind controlling a squadmate
Cause an enemy to die in a vehicle explosion
Complete a successful ambush
Complete a Rumor
Complete the tactical tutorial
Kill an alien ruler the first time you encounter it
Purchase all of the final tier Hunter Weapons
Use all ruler armor abilities in a single mission
Kill the Archon Ruler
Kill all alien rulers in a single game
Use a ruler armor ability against an alien ruler
Kill the Berserker Ruler
Kill the Viper Ruler
Kill an alien ruler while it attempts to escape
Investigate the Abandoned Research Facility
Defeat an Avatar with a SPARK unit
Outfit a SPARK unit with the highest tier weaponry and armor
Complete a mission with three or more SPARK units in the squad
Promote a SPARK unit to Champion rank
Build a SPARK unit
A SPARK unit survives a mission it started with less than half health
Hit three shots on a single turn with a SPARK unit after using its Overdrive ability
Beat the Lost Towers mission
Defeat a robotic enemy with a SPARK unit
Kill an enemy primed Derelict MEC before it can self-destruct
Complete a mission with all Tired soldiers and no casualties
Form a level 3 bond between two soldiers
Raise a Templar to maximum Focus level, spend it all, and reach the max again in a single mission
Get 15 Headshots against Lost in a single turn
Raise XCOM's influence with all three factions to High in a single game
Permanently defeat one of the Chosen
Perform three offensive actions against the same target with a Skirmisher in a single turn
Get four kills from Shadow mode with a Reaper in a single mission
Rescue a soldier who was captured by the Chosen
Complete the Lost and Abandoned mission
Complete a single player campaign with Tactical Legacy Pack content
Complete a random legacy operation
Complete 'The Lazarus Project' legacy operation with a gold medal
Complete the 'Avenger Assembled' legacy operation with a gold medal
Complete the 'It Came From the Sea' legacy operation with a gold medal
Complete the 'Blast From the Past' legacy operation with a gold medal
Complete a Skirmish Mission
Complete a Local Challenge