100 An Army Of FourBeat the game without buying a Squad Size upgrade (Classic+ difficulty)
100 Apotheosis DeniedDeal with the newest global threat
100 Guardian of EarthDesignate a highly decorated soldier as the Volunteer
20 A Little Bit AlienModify a soldier in single player
20 All Hands On DeckGet at least 4 kills with XCOM Base Security personnel
20 Anger ManagementProc Combat Rush on the entire squad (min. 4)
20 Enemy WithinGet a Soldier to have 5 modifications in single player
20 G’dayKill an elite enemy Sniper with one of your own snipers in single player
20 Mind the StepJump two stories in one move in single player
20 Mutatis MutandisField a squad where all members have at least two modifications (min. 4) and win the mission
20 Nice CoverUse Collateral Damage to blow up a car in single player
20 Ours are the FuriesComplete Furies
20 Regenerate ThisKill an elite enemy Medic with explosive damage in single player
20 Rise of the MachinesField a squad consisting entirely of augmented soldiers and SHIVs (min. 4) and win the mission
20 ShieldbusterEliminate an enemy's shield and kill it on the same turn in single player
20 Solid ProspectComplete Deluge
20 Someone Your Own SizeKill a Muton Berserker in melee combat in single player
20 Taking A Load OffStop a squad member from suffocating in single player
20 The Meld SquadField a fully enhanced squad and win the mission
20 They Shall Not PassEliminate all alien waves
20 Who Needs Limbs?Augment a soldier in single player
20 Zom-B-GoneEradicate the infestation
40 By Our Powers CombinedField a squad with 4 augmented soldiers, each with a different base ability and win the mission
40 Elite DefenseBeat a new special mission without losing any assets
40 Mental MinefieldKill an enemy as it is psionically attacking you in single player
40 Pain in the NeckCause an enemy to suicide
40 Remington… Max RemingtonHave your special-duty soldier kill three enemies in the same mission
40 Steel MartyrDeploy three tactical subsystems on a single soldier in single player
40 Tingling SensationKill an unseen enemy detected by a specially modified soldier in single player
40 Where in the WorldMake certain of the new threat's location