In 1999, game developer Mike Mika did what most people in love do: he found a grand, romantic way to propose. He just picked a method with a catastrophic flaw: it all depended on his girlfriend voluntarily playing a video game she had no interest in playing.

Mika was the lead engineer on the Game Boy Color port of Klax, an Atari puzzle game, and a launch-window title for Nintendo’s new handheld. As he told WIRED, he realized he had a little spare room in the game’s memory and a girlfriend, Micki, who only liked puzzle games. The logic wrote itself. “She loves puzzle games, I’m doing a puzzle game now, so let me just put that out there, and she will find this thing in the game,” he recalled thinking. So, he hid a marriage proposal in the code of every commercial copy of Klax that shipped.

He hid it well.........

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