You could grind through Mortal Kombat's Krypt and Challenge Tower to get the codes for every Fatality, Stage Fatality and Babality in the game, or you could just bookmark this handy list and save yourself a whole load of time. Each character has 2 regular Fatalities, a Stage Fatality and a Babality. Oh and a few of the ninjas have a Classic Fatality you can perform but you need their DLC Classic costume to perform it.

Note: Stage Fatalities need to be performed from different distances depending on the level.

Baraka

  Take A Spin:  Press Forward, Forward, Down, Down, A/X when in sweeping distance.
Up The Middle:  Press Back, Forward, Down, Forward, X/Square when in sweeping distance.
Babality:  Forward, Back, Forward, B/Circle at jumping distance.
Stage Fatality:  Down, Down, Down, Down, A/X.

Cyber Sub-Zero

  Brain Freeze:  Press Down, Down, Back, Down, X/Square when in jumping distance.
Kold Fusion:  Press Down, Back, Down, Forward, Y/Triangle when in jumping distance.
Babality:  Down, Back, Forward, RT/R2 at jumping distance.
Stage Fatality:  Down, Down, Up, RT/R2.

Cyrax


Buzz Kill:  Press Forward, Down, Forward, Back, Y/Triangle when touching.
Nothing But Net:  Press Back, Down, Back, Forward, X/Square when in jumping distance.
Stage Fatality:  Down, Up, RT/R2.
Babality:  Press Down, Forward, Back, Y/Triangle when in jumping distance.

Ermac

  Mind Over Splatter:  Press Down, Up, Down, Down, RT/R2 when in jumping distance.
Pest Control:  Press Forward, Back, Forward, Down, B/Circle when in jumping distance.
Stage Fatality:  Press Down, Up, Down, Down, A/X.
Babality:  Down, Down, Back, Down, Y/Triangle at jumping distance.

Jade

  Half Mast:  Press Back, Down, Back, Down, B/Circle when in sweeping distance.
Head-A-Rang:  Press Up, Up, Down, Forward, X/Square when in fullscreen distance.
Stage Fatality:  Press Back, Forward, Down, RT/R2.
Babality:  Down, Down, Forward, Down, B/Circle at jumping distance

Jax

  Smash And Grab:  Press Back, Forward, Forward, Back, Y/Triangle when touching.
Three Points!:  Press Forward, Forward, Back, Down, A/X when in sweeping distance.
Stage Fatality:  Press Down, Forward, Down, X/Square.
Babality:  Down, Down, Down, A/X at jumping distance.

Johnny Cage

 
And The Winner Is!...:  Press Down, Forward, Down, Forward, B/Circle when in sweeping distance.
Heads Up!:  Press Forward, Forward, Back, Down, A/X when close.
Babality:  Forward, Back, Forward, B/Circle at jumping distance.
Stage Fatality:  Down, Back, Forward, RT/R2.

Kabal

  Hook Up:  Press Back, Forward, Back, Forward, X/Square when in sweeping distance.
It Takes Guts:  Press Down, Down, Back, Forward, RT/R2 when in sweeping distance.
Babality:  Forward, Down, Back, A/X at jumping distance.
Stage Fatality:  Down, Down, B/Circle.

Kano

  Eat Your Heart Out:  Press Down, Down, Forward, Back, B/Circle when in sweeping distance.
Heartbreak:  Press Back, Down, Back, Forward, X/Square when in sweeping distance.
Babality:  Forward, Forward, Down, Down, A/X at jumping distance.
Stage Fatality:  Up, Up, Back, A/X.

Kitana

 
Fan Opener:  Press Down, Down, Back, Forward, Y/Triangle when close.
Splitting Headache:  Press Forward, Down, Forward, Back, A/X sweeping distance.
Stage Fatality:  Forward, Down, Down, A/X.
Babality:  Forward, Forward, Down, Forward, B/Circle in jumping distance.

Kratos

Note: Available on PS3 Version only
Fatality 1:  Down, Down, Back, Forward, Triangle at close range.
Fatality 2:  Down, Back, Down, Forward, Square at jumping distance.
Stage Fatality:  Down, Down, Down, X.
Babality:  Down, Forward, Back, Triangle at jumping distance.