Mortal Kombat 4 (Arcade)

Mortal Kombat 4 makes the series jump to 3D...into a pit filled with spikes.

Unused Graphics
There are two unused character portraits in the game that would go unused from arcade revisions 1.0 to 3.0. These include one of Kitana and of Noob Saibot, both of which were completely removed in revision 2.1. Noob Saibot's portrait was used in home ports when he was a secret character.

Unused Character Biography Screens
Revision 1.0 of the game has its character biography screens disabled by default, but they can be reactivated with the use of cheats. The screens contain joke type commentary about each character, and were most likely disabled for this reason. Note that in this revision, Fujin's biography references him by the name "WindGod", along with Noob Saibot's biography being unfinished.

Unused Characters
Noob Saibot can be accessed in revision 1.0 of the game using cheats, but was later completely replaced by Reiko in revision 2.1. He has a very limited moveset which includes the ability to use his teleport slam, along with being able to wield a spiked mace. He would later return as a playable character in home console releases of the game.

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Red Herrings
Two false audits, "Dogs" and "Loffs", can be found in the Audits screen.

Unused Kombat Kode
Present at : The sequence to access this code doesn't appear to exist in this version or any of the console ports.