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