Mortal Kombat 11 – All Fatalities & Secret Fatalities for every Character from the full game, including Shao Kahn, Frost & Kronika. This video shows both Fatalities for all characters (Standard Fatality & Secret Fatality).
There are 25 characters and 50 Fatalities in the game (every character has 2 Fatalities). Plus there’s Kronika which is the tower endboss but she’s not a playable character. The first fatality is unlocked from the start. The second one can be unlocked in the Krypt from chests or you can play AI matches and let the AI do them for you.
You must do both fatalities of each character to unlock their respective trophy or achievement. The quickest way to do this is going to Klassic Towers, select Endless Tower, choose the character you want to do both Fatalities with, in Character Select press Square (PS4) / X (XB1) to enable the AI to play for you, put it on Very Easy difficulty, lean back and watch the AI do the fatalities for you. This still unlocks the trophies & achievements without any button input required by you.
The way you do it normally is when it shows you the “Finish Him / Her” screen after defeating the opponent, you must input the correct button sequence. It’s different for every character but you can view it in the Move List. There’s a Fatality Training mode in the “Learn” Menu that teaches you this.
Below are timestamps for every character. I go through them in the same order as the in-game character select (row by row from top to bottom).