The original Mortal Kombat games were subject to many players speculating about their secrets. Some were true, while others were concocted by the imaginative, Internet-less people of the '90s. However, it was only recently discovered that the original games contained secret menus.

　　The Cutting Room Floor, a website dedicated to unearthing secret content in video games, uncovered the secret EJB menus (named after series creator Ed Boon) last year (via Eurogamer). Now, YouTuber YourMKArcadeSource has showcased the menus on their channel.

　　The secret menus contain things like diagnostic tests, coin bookkeeping, and character endings. The first two Mortal Kombat game menus have an item called "Hello," which YourMKArcadeSource believes is a list of people Ed Boon wanted to say hello to.

　　Ultimate Mortal Kombat 3's secret menu features the ability to enable hidden characters, Fatality demonstrations, and an overwhelmingly difficult Galaga-type game.

　　To access these menus, you'll need to input a special code on the cabinet. The codes consist of hitting the P1 (player 1) button and the P2 (player 2) button in a specific order in fast succession. You can check out the codes below, courtesy of the above video's description.

Mortal Kombat

Mortal Kombat II

Mortal Kombat III/Ultimate Mortal Kombat III

　　The old games aren't the only ones with secrets. Mortal Kombat X featured many of its own, including secret brutalities for the character Tremor.