Cheat menu:
Select any game. Before game play is started, hold L1 + L2 + R1 + R2 and press Select. Repeat this code two times to access the "Operators Options Screen". Various options including the number of starting lives, and difficulty may be adjusted for any of the games.

Mortal Kombat 3 sounds:
The Williams Arcade's Greatest Hits disc contains sounds from Mortal Kombat 3. Turn on the PlayStation without a CD. When the main menu appears, select the CD Player. Load the disc. Two tracks will be displayed. Play track two for five minutes and twenty seconds of character names with wins and flawless victories.