Mortal Kombat 11

Here are the fatality inputs for every character. Secondary fatalities can be performed even if they are not yet unlocked in the Krypt.

(All inputs are based on you being on the left)

Baraka:
Food For Thought (Close):
Rock, Paper, Baraka (Close):

Cassie Cage:
I <3 U (Mid):
#GirlPower (Far):

Cetrion:
Maintaining Balance (Mid):
Good And Evil (Mid):

D'Vorah:
New Species (Close):
Can't Die (Mid):

Erron Black:
Melted (Mid):
Death Trap (Mid):

Frost:
Ice Sculpture (Close):
The Cyber Initiative (Mid):

Geras:
Phasing Through Time (Anywhere):
Peeling Back (Close):

Jacqui Briggs:
Spider Mines (Mid):
Nothin' But Neck (Mid):

Jade:
Bow Before Me (Anywhere):
Pole Dance (Close):

Jax Briggs:
Coming In Hot (close):
Still Got It (close):

Johnny Cage:
Mr Cage's Neighborhood (Close):
Who Hired This Guy (Close):

Kabal:
Road Rash (Mid):
Hooked (Close):

Kano:
Last Dance (Close):
Face Like A Dropped Pie (close):

Kitana:
Gore-Nado (Mid):
Royal Execution (Mid):

Kollector:
For The Kollection (Close):
Head Lanter (Close):

Kotal Kahn:
Totem Sacrifice (Close):
Kat Food (Close):

Kung Lao:
Headed Nowhere (Close):
Meat Slicer (Close):

Liu Kang:
Burn Out (Close):
Belly of the Beast (Mid):

Noob Saibot:
Split Decision (Mid):
Double Trouble (Close):

Raiden:
Alternating Current (Mid):
Direct Current (Close):

Scorpion:
You're Next (Far):
Chain Reaction (Far):

Shao Kahn:
Back Blown Out (Close):
Kahn-Sequences (Close):

Skarlet:
Bloody Mess (Mid):
Heart Condition (Mid):

Sonya Blade:
To The Choppa (Mid):
Supply Drop (Close):

Sub-Zero:
Ice-Cutioner (Mid):
Frozen In Time (Mid):

In this video guide I will show you two ways to earn the 15 and 30 different fatalities as well as work on the character fatality achievements. For the first 10 characters I just used the klassic towers to get the achievement progress for I Want It All. Make sure to put it on very easy to make things quicker. Also pick the shortest tower.
After getting your I Want It All achievement the method with be a lot faster. Once in the main menus press the start button to go into the options menu. Scroll down to change the rounds to win to one. Then back out, go into the fight menu, select local, make sure to press X to turn on the CPU, and then select your character. You only have the one health bar to deal with to get to the fatality.
Achievement progress also counts if AI do a fatality.