Unlockable Characters
Unlock the character Blaze by first completing the "Konquest" mode. At the "vs" screen, scroll over to Radian's character icon. Hold the down arrow key and press "A," this will unlock Blaze. To unlock Mokap, finish all of the missions in "Konquest" mode. At the "vs" screen, highlight Cyrax's character icon, then hold the down arrow key and press "A" to unlock.
25,000 Koins Cheat
To give yourself an automatic 25,000 koins, you must create a new profile at the start-up screen. Name the profile "KWICKKASH," and you will start with a 25,000 koin credit.
Fatalities
To perform one of Mortal Kombat's signature finishing moves, press the "L1" button when the game says "Finish Him/Her" to get into the finishing stance. From there, press these combination of buttons to perform each character's individual fatality:
Johnny Cage's "Brain Ripper": press back, back, down, circle
Kano's "Heart Grab": press forward, up, up, down, square
Scorpion's "Spear": press back, back, down, back, circle
Jax's "Head Stomp": press down, forward, forward, down, triangle
Sonya's "Kiss": back, forward, forward, down, triangle
Raiden's "Electrocution": back, forward, forward, forward, X
Reptile's "Acid Shower": up, up, up, forward, X
Kitana's "Kiss of Doom"; down, up, forward, forward, triangle
Sub Zero's "Spine Rip": back, forward, forward, down, X
Shang Tsung's "Soul Steal": up, down, up, down, triangle
Quan Chi's "Neck Stretch": back, back, forward, back, X
Alternate Costumes
Each selectable character will have different costumes that they can change into. These additional customs are rewards that get unlocked by winning matches in the game mode. Once unlocked, select your character from the "vs" screen and then press the start button. You will then be able to select the costume you want your character to use in the upcoming match.