After an opponent has beaten you and the anouncer yells "Finish Him!" it is time to input a Hari Kiri. Hari Kiris require no set distance unlike fatalities. To perform one simply put in the code while your character is dazed after losing a battle.
After you have beaten an opponent and the announcer yells "Finish Him!" it is time to input a Fatality. Fatlities require a set distance to perform. The distances are:
Close: 1 step away from your dazed opponent Sweep: 2 steps away from your dazed opponent Far: 5-6 steps away from your dazed opponent (end of arena)
After you are at the required distance press the L trigger to enter the Fatality stance. Then input the fatality code.
Code
Effect
Down, Down, Up, Up, Y (close)
Ashrah's First Fatality
Forward, Down, Forward, Down, Y (sweep)
Ashrah's Second Fatality
Forward, Up, Down, Y (close)
Baraka's First Fatality
Forward, Down, Back, Forward, Y (sweep)
Baraka's Second Fatality
Down, Up, Forward, Forward, Y (sweep)
Bo Rai Cho's First Fatality
Up, Back, Forward, A (sweep)
Bo Rai Cho's Second Fatality
Down, Up, Back, Back, X (sweep)
Dairou's First Fatality
Down, Down, Back, A (close)
Dairou's Second Fatality
Up, Down, Back, Forward, A (sweep)
Darrius's First Fatality
Down, Forward, Forward, Up, X (close)
Darrius's Second Fatality
Down, Back, Back, Down, A (sweep)
Ermac's First Fatality
Back, Down, Back, Down, B (sweep)
Ermac's Second Fatality
Down, Forward, Forward, Up, B (close)
Havik's First Fatality
Forward, Forward, Forward, Back, Y (sweep)
Havik's Second Fatality
Forward, Up, Back, Down, X (sweep)
Hotaru's First Fatality
Down, Forward, Back, Forward, Y (close)
Hotaru's Second Fatality
Back, Forward, Up, Forward, X (sweep)
Jade's First Fatality
Back, Forward, Forward, Forward, Y (close)
Jade's Second Fatality
Forward, Up, Up, Up, A (close)
Kabal's First Fatality
Up, Up, Down, Down, Y (close)
Kabal's Second Fatality
Forward, Forward, Back, Back, Y (sweep)
Kenshi's First Fatality
Up, Forward, Back, Forward, Y (sweep)
Kenshi's Second Fatality
Back, Forward, Forward, Back, B (far)
Kira's First Fatality
Up, Forward, Down, Back, A (sweep)
Kira's Second Fatality
Down, Back, Forward, Down, B (close)
Kobra's First Fatality
Forward, Back, Forward, Forward, Y (close)
Kobra's Second Fatality
Forward, Forward, Forward, Forward, X (sweep)
Li Mei's First Ftality
Up, Back, Forward, Forward, B (sweep)
Li Mei's Second Fatality
Back, Back, Back, Forward, Y (sweep)
Liu Kang's First Fatality
Forward, Forward, Up, Up, A (sweep)
Liu Kang's Second Fatality
Forward, Forward, Down, Down, X (sweep)
Mileena's First Fatality
Up, Up, Forward, Forward, A (far)
Mileena's Second Fatality
Back, Forward, Back, Forward, X (far)
Nightwolf's First Fatality
Down, Forward, Down, Up, Y (sweep)
Nightwolf's Second Fatality
Back, Forward, Back, Forward, B (must be noob) (sweep)
Noob Saibot & Smoke's First Fatality
Up, Down, Down, Forward, Y (must be smoke) (sweep)
In Konquest Mode, The "Walk on Air" glitch can be performed in the Realm of Order. Go to the outermost walkway in H-5, and touch the invisible barrier while you change from H-5 to H-6. You will end up being able to walk on the grey air, and even go out where it looks like you can't. You should then be in the negative area.
When using using Liu Kang, perform his second fatality against Shujinko (the fatality where he "dives" into the opponent's body). When that happens, Liu Kang will tear off Shujinko's head and you will see no head whatsoever. This will only work on Shujinko.
You can only do this after you complete a mission and go back to the person to get your reward. If this person runs away, follow him. When he stops he will start to throw his aarm down to dissapear. Right before he does this run into him. He will stop and not dissapear. Talk to him again and he will say the exact same thing as before. He will also give you the same number of koins.