According to information shared by the YourMKArcadeSource channel, the classic fighting game had a secret screen that had been unknown until then.
In the secret menu, it is possible to watch each character's ending, access the number of matches played on the arcade machine, and use some other more technical functions. In the third title, it is also possible to watch all of the characters' fatalities.
According to the source, the menu is called “EJB Menus” and was programmed by Ed Boon, one of the main creative minds behind the Mortal Kombat games.