The Bigger They Are
Not unlocked yetComplete Gangplank.
Rising Dragon
Not unlocked yetTake your new ally into the final challenge.
All Aboard
Not unlocked yetComplete Confounding Light with more than 3 turns left on the timer.
Who Needs Limbs?
Not unlocked yetAugment a soldier in single player
A Little Bit Alien
Not unlocked yetModify a soldier in single player
Enemy Within
Not unlocked yetGet a Soldier to have 5 modifications in single player
Steel Martyr
Not unlocked yetDeploy three tactical subsystems on a single soldier in single player
Apotheosis Denied
Not unlocked yetDeal with the newest global threat
Lone Wolf
Not unlocked yetClear a UFO crash site with one soldier on Classic or Impossible difficulty.
They Shall Not Pass
Not unlocked yetEliminate all alien waves
Zom-B-Gone
Not unlocked yetEradicate the infestation
An Army Of Four
Not unlocked yetBeat the game without buying a Squad Size upgrade (Classic+ difficulty)
The Meld Squad
Not unlocked yetField a fully enhanced squad and win the mission
Shieldbuster
Not unlocked yetEliminate an enemy's shield and kill it on the same turn in single player
Someone Your Own Size
Not unlocked yetKill a Muton Berserker in melee combat in single player
Taking A Load Off
Not unlocked yetStop a squad member from suffocating in single player
Where in the World
Not unlocked yetMake certain of the new threat's location
Mind the Step
Not unlocked yetJump two stories in one move in single player
Nice Cover
Not unlocked yetUse Collateral Damage to blow up a car in single player
Bada Boom
Not unlocked yetKill 50 aliens with explosive weapons.
By Our Powers Combined
Not unlocked yetField a squad with 4 augmented soldiers, each with a different base ability and win the mission
Rise of the Machines
Not unlocked yetField a squad consisting entirely of augmented soldiers and SHIVs (min. 4) and win the mission
Mutatis Mutandis
Not unlocked yetField a squad where all members have at least two modifications (min. 4) and win the mission
Mental Minefield
Not unlocked yetKill an enemy as it is psionically attacking you in single player