Blood mode
Quickly press Up, Down, A, B, C, Left(2), Down, Start during game play.
Cheat menu
Press Down, Up, Left(2), A, Right, Down at the title screen. Select the "Cheat Enabled" option to access the following features:
P1 Win: Kill player two with one hit
P2 Win: Kill player one with one hit
Moon: Silhouettes appear in front of the moon
Dads: Strange player names
Green: Reptile appears before each match with a message
Lives: Unlimited credits
Flag 6: CPU does fatalities after winning two rounds
Turbo: Faster game play
Blood: Blood mode
Fight against Reptile
Enable the "Cheat menu" code and turn on the "Moon" and "Blood" options. Begin a match on The Pit stage and defeat your opponent with a double flawless and no blocks. Additionally, a fatality should be used to complete the patch, but do not use an upper-cut. When this is accomplished, your fighter will begin the next match against Reptile at the bottom of The Pit.
Green Sub-Zero and Scorpion
Press Start on controller two during a match with Reptile. Sub-Zero and Scorpion will turn green at the player selection screen.
Blood mode...