Here is the full list of all 58 Mortal Kombat 11 achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Hit the Gong in the Krypt
Reach The Kredits
Komplete Story Mode
Komplete 50% of Story Mode
Komplete all Basics Tutorials
Komplete all Advanced Tutorials
Komplete all Strategy Tutorials
Spill 10,000 pints of blood
Perform 15 different FATALITIES
Perform 30 different FATALITIES
Perform 25 BRUTALITIES
Perform 100 BRUTALITIES
Show MERCY 10 times
Open 200 Krypt chests
Play 50 Kasual Versus matches
Pay 100 total respect points in King of the Hill
Komplete a Novice, Warrior, or Champion Klassic Tower once
Komplete the Novice, Warrior, or Champion Klassic Towers with 10 different kharacters
Komplete 125 Towers
Komplete 250 Towers
Flip Stance 50 times during a match
Play a Group Battle with 2 other players
Perform 2 different FATALITIES with Baraka
Perform 2 different FATALITIES with Cassie Cage
Perform 2 different FATALITIES with Cetrion
Perform 2 different FATALITIES with Frost
Perform 2 different FATALITIES with D'Vorah
Perform 2 different FATALITIES with Erron Black
Perform 2 different FATALITIES with Jacqui Briggs
Perform 2 different FATALITIES with Jade
Perform 2 different FATALITIES with Jax
Perform 2 different FATALITIES with Johnny Cage
Perform 2 different FATALITIES with Kabal
Perform 2 different FATALITIES with Kano
Perform 2 different FATALITIES with Kitana
Perform 2 different FATALITIES with Kollector
Perform 2 different FATALITIES with Kotal Kahn
Perform 2 different FATALITIES with Kung Lao
Perform 2 different FATALITIES with Liu Kang
Perform 2 different FATALITIES with Noob
Perform 2 different FATALITIES with Raiden
Perform 2 different FATALITIES with Scorpion
Perform 2 different FATALITIES with Skarlet
Perform 2 different FATALITIES with Sonya
Perform 2 different FATALITIES with Sub-Zero
Perform 2 different FATALITIES with Geras
Defeat an opponent as Bug-Vorah
Duck 100 times during a match
Play 10 AI Battle Simulator sets
Play 25 AI Battle Simulator sets
Run 5 miles in the Krypt
Equip 5 different character intros
Equip 5 different character victories
Use 50 Konsumables
Use 100 konsumables
Spear 50 hanging bodies in the Krypt
Impale a head in the warrior shrine
Spend 50,000 koins in the Naknadan shrine