During the story screen, press the following buttons very quickly: HK, LK, RN, LP, HP, HP, HP, LP, LP. If it is done right you'll hear "Oh-Maw" and you'll get borh the Red and Blue ?'s. These question marks will open up some hidden extra options which are outlined below.
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Red Question Mark
| Freeplay | ON/OFF |
| Fatality Time | ON/OFF |
| Collision Boxes | ON/OFF |
| One Round Matches | ON/OFF |
Blue Question Mark
| Level Select | ON/OFF |
| Throwing | ENABLED/DISABLED |
| Unlimited Run | ENABLED/DISABLED |
| Bloody Kombat | ON/OFF |
| Smoke | ON/OFF |
| Khameleon | ON/OFF |
Highlight Sonya and press Up + Start.
To play as Human Smoke, press and hold Away, High Punch, High Kick, L, R before the screen says "Fight".
At the story line, press C-Right, C-Up, A, B, C-Down, C-Up, C-Right.
This trick only works on the Desert and Wastelands. Choose anyone, but before the match starts press and hold Away + Low Kick + High Kick. When the match starts you will morph into Motaro.
Select the Rooftop stage, Pit 3, or Kahn's Kave. Before the match starts, hold Down + High Punch + Low Punch.
If you hear the word "Toasty" on the Star Bridge stage, quickly press Down + Start to fight Khameleon.
For unlimited credits, press Down, Down, Up, Up, Right, Right, Left, Left at the attract mode screen.
First of all, you must do the Babality move. When the screen turns black and
your opponent turns into a baby, hold these four buttons: HP, LP, HK & LK. You
must continue to hold these buttons until the baby explodes.
While doing the Head Punch Off fatality with Johnny Cage, hold HP, BLK & LP all at once. Johnny Cage will then punch three heads off.
On the character selection screen, put your cursor on Noob Saibot for player one or Rain for player two. Now hold up and press start. Your cursor will then select a fighter for you at random.
If you complete the tasks listed below, you will unlock the corresponding bonus mini game:
Space Invaders -- Play 50 two-player matches in a row
Pong -- Play 100 two-player matches in a row
Galaga -- In the Pit Stage, if a silhouette goes over the moon, hit Z
When the story screen comes up, rotate your control pad in a clockwise direction. After a few rotations the Kombat Kode screen should appear. Kombat Kodes are entered using a button to control each of the six boxes. (P1 and P2 refer to player 1 and player 2.) P1 will enter the first three boxes, P2 will enter the second three boxes.
The enter the codes, you have to change the boxes to match the symbols... because we can't actually show the symbols, we use numbers instead to represent the codes. To use any of the Kombat Codes, just read out the numbers required for the Kode, and then translate using the following key:
| Number | Original Symbol |
| 0 | Dragon |
| 1 | MK |
| 2 | Yin-yang |
| 3 | "3" |
| 4 | Question mark |
| 5 | Lightning |
| 6 | Goro |
| 7 | Rayden |
| 8 | Shao Kahn |
| 9 | Skull |
Below are the various Kombat Kodes:
The Stages
| Effect | Code |
| STREETS | 079-035 |
| BRIDGE | 077-022 |
| SHAO KHAN'S CAVE | 004-700 |
| ERMAC'S PORTAL | 933-933 |
| NOOB SAIBOT'S DORFEN | 050-050 |
| SUBWAY | 880-088 |
| SCORPION'S LAIR | 666-444 |
| PIT 3 | 820-028 |
| ROOF TOP | 343-343 |
| SOUL CHAMBER | 123-901 |
| TEMPLE | 600-040 |
| THE WATERFRONT | 002-003 |
| THE GRAVE YARD | 666-333 |
| JADE'S DESERT | 330-033 |
| BELL TOWER | 091-190 |
| SHAO KHAN'S TOWER | 880-220 |
| DEAD POLL | 222-222 |
| ARMORY | 191-191 |
| THE PIT | 919-919 |
| STAR BRIGDE | 606-606 |
| THE TOWER | 101-101 |
| THE PORTA | 007-007 |
| PIT 2 | 166-661 |
| COURT YARD | 121-121 |
| WASTELAND | 212-212 |
| THE LAIR | 000-666 |
Handicaps
| Effect | Code |
| P1 1/2 ENERGY | 033-000 |
| P2 1/2 ENERGY | 000-033 |
| P1 1/4 ENERGY | 707-000 |
| P2 1/4 ENERGY | 000-707 |
| SUPER ENDURANCE | 024-689 |
| P1 DOES 1/2 DAMAGE | 390-000 |
| P2 DOES 1/2 DAMAGE 000-390 |
| NO SPECIAL MOVES | 555-556 |
| COMBOS DISABLED | 722-722 |
| THROWING DISABLED | 100-100 |
| BLOCKING DISABLED | 020-020 |
Different Kombats
| Effect | Code |
| REAL KOMBAT | 040-404 |
| PSYCHO KOMBAT | 985-125 |
| RANDPER KOMBAT (#1) | 444-444 |
| RANDPER KOMBAT (#2) | 460-460 |
| DARK KOMBAT | 688-422 |
| SILENT KOMBAT | 300-300 |
| BLOODY KOMBAT | 109-901 |
The Winner of the 1st Round Fights...
| Effect | Code |
| CLASSIC SMOKE | 205-205 |
| NOOB SAIBOT | 769-342 |
| MOTARO | 969-141 |
| SHAO KHAN | 033-564 |
| KHAMELEON | 123-321 |
Secret Messages
| Effect | Code |
| RAIN CAN BE FOUND IN THE GRAVE YARD | 717-313 |
| THERE IS NO KNOWLEDGE THAT IS NOT POWER! | 123-926 |
| HOLD FLIPPERS DURING CASINO RUN | 987-666 |
| NO FEAR,MAX COUNTDOWN,E B BUTTON,SKYDIVE | 282-282 |
| WHACHA GUN DO? E.B. | 004-400 |
| SKUNKY!! | 122-221 |
| DON'T JUMP AT ME | 448-844 |
| PLAY THE WAVENET ULTIMATE MK 3 | 550-550 |
| BABALITIES ARE REVERSIBLE! | 202-808 |
Other Effects
| Effect | Code |
| AUTOMATIC KOMBOS | 484-484 |
| INVISIBLE ENERGY BARS | 987-123 |
| SHOW THE REVISION # | 999-999 |
| UNLIMITED RUN | 466-466 |
| HYPER RUN JUMPS | 321-789 |
| PLAY GALAGA | 642-468 |
| UPPERCUT RECOVERY | 788-322 |
| PLAY PONG | 246-246 |
For "2 ON 2" and "3 ON 3" Games
| Effect | Code |
| EXPLOSIVE KOMBAT & BLOCKING DISABLED | 022-220 |
| EXPLOSIVE KOMBAT | 227-227 |