Mortal Kombat, the game from 1992, had hidden a secret menu from us all until late in 2015. Now that’s some pretty subtle secret-keeping skills for a series so utterly lacking in subtlety. It’s a developer menu present on Mortal Kombat, as well as its sequels Mortal Kombat 2, 3 and Ultimate Mortal Kombat 3, accessed on the arcade versions by inputting a sequence of button presses. The long-hidden dev menus allows such fun things as checking the arcade machine is running all nice and funky-like, a ‘hello’ shout-out screen and the ability to watch each and every character’s ending at the push of a button. I likely would have…