Ermac in mortal kombat

Sticking with the fighting game genre, many believed for years that a character who later became playable, was in fact hidden in the first Mortal Kombat. The phrase 'ERMACS' appeared on the diagnostics menu of the arcade version of the game, which sent people into meltdown trying to find a way to play as him. Sadly, ERMACS in this case didn't refer to the name of the eventual character, it just meant 'ERror MACroS', which was designed to display when the game was erroring out.

Given that Ermac is now a character in the game, it's safe to say, as a character, he was willed into existence. Weird.