Full list of all 74 Injustice 2 (Windows) achievements worth 1,195 gamerscore. It takes around 150-200 hours to unlock all of the achievements in the base game.
The base game contains 62 achievements worth 1,000 Gamerscore, and there are 11 DLC packs containing 12 achievements worth 195 Gamerscore.
Knock an opponent into the Memorial Station Arena Transition at 4:30
Knock an opponent into the Empire Theatre Arena Transition at 8:00pm
Throw 3 kegs during a match with Gorilla Grodd at the Ace o' Clubs
Perform 3 background bounces on the Empire Theatre background
Win 10 ranked matches
Win 50 player matches
Play 200 online matches
Knock an opponent into an Arena Transition 25 times
Have the final hit come from the crocodile in Slaughter Swamp
Duck 10 times in a row during a match
Complete 50% of Story mode
Complete 100% of Story mode
Complete Story mode after doing all alternate paths
Vote correctly 10 times in King of the Hill
Dethrone a King 5 times in King of the Hill
Complete 25 Multiverse events
Complete 100 Multiverse events
Join a Guild
Open 100 Mother Boxes
Perform every Supermove
Bane must defeat Batman with the final hit coming from a Meter Burn Bane Bomb
Black Canary must defeat any opponent with the final hit coming from a level 3 Canary Cry
Catwoman must defeat Cheetah with the final hit coming from Cat Call
Poison Ivy must defeat any opponent with the final hit coming from Kiss of Death
Cheetah must defeat Wonder Woman with her Meter Burn Blood Lunge
Atrocitus must defeat Green Lantern with the final hit coming from a Meter Burn Life Drain
Swamp Thing must defeat Poison Ivy with the final hit coming from Green Kingdom
Win a match as Deadshot without missing a shot (minimum 10 shots)
Robin must defeat Batman with the final hit coming from a Meter Burn Assassin Strike
Aquaman must defeat any opponent with the final hit coming from The Beast Below
Batman must defeat any opponent with the final hit coming from Cape Parry or Cape Counter
Brainiac must defeat any opponent with the final hit coming from Beta Strike
Captain Cold must defeat Flash with the final hit coming from Cryogenic Blast
Flash must defeat Captain Cold with the final hit coming from Time Changer
Gorilla Grodd must defeat Flash with the final hit coming from Mind Control
Blue Beetle must defeat any opponent with the final hit coming from a Meter Burn Mandible Strike
Black Adam must win the match with the final hit coming from Orbs of Seth
Cyborg must defeat Robin with the final hit coming from Apokolips
Firestorm must defeat Captain Cold with the final hit coming from a Meter Burn Molten Trap
Green Arrow must defeat Black Canary with the final hit coming from Target Practice
Green Lantern must defeat Atrocitus with the final hit coming from Mechanized Assault
Harley must defeat Joker with the final hit coming from Go Night Night
Joker must defeat Batman with the final hit coming from Not So Funny Is It?
Scarecrow must defeat any opponent with the final hit coming from Schizophrenia
Supergirl must defeat Superman after connecting 20 Kryptonian Lasers
Superman must defeat Green Lantern with the final hit coming from Final Flight
Wonder Woman must win the match with the final hit coming from a Meter Burn Lasso of Truth
Doctor Fate must defeat any opponent with the final hit coming from Amulet of Anubis
Go 10 seconds of the match without being hit by your opponent
View all character endings in the Battle Simulator
Collect a total of 200 pieces of Common Gear, excluding shaders
Collect a total of 100 pieces of Rare Gear, excluding shaders
Collect a total of 50 pieces of Epic Gear, excluding shaders
Sell a total of 250 pieces of gear
Win 5 AI Battle Simulation matches
Reach level 35 in Player XP
Reach max level with all characters
Beat an opponent online while they still have 90% health and you have 10% or less health remaining
Harley must dethrone an opponent in King Of The Hill with the final hit coming from Double-Trouble
Play as Batman and send all Gotham villains through the Arkham Transitions
Win a match with each villain
Be in the Batcave when all the Environmental Interactions are used
Darkseid must defeat any opponent after summoning each Parademon at least once
Red Hood must defeat any opponent with the final hit coming from Gotham's Outlaw
Sub-Zero must connect 10 Klones during a match
Starfire must defeat any opponent with the final hit coming from Starry Night
Black Manta must defeat any opponent with the final hit coming from Speared and Seared
Raiden must summon Kidd Thunder during a match
Hellboy must defeat any opponent with the final hit coming from Final Resting Place
Atom must defeat any opponent with the final hit coming from an Atom Lunge
Enchantress must defeat any opponent with the final hit coming from Out of Body Experience
Win a match with each Teenage Mutant Ninja Turtle
Complete any 3 categories in Advanced Training or Strategy Training
Reach level 30 with any character