Here's something juicy: video game developer Redlynx, creators of the Trials series, embedded clues in their 2012 game Trials Evolution that launched a hunt which spilled out into the real world and broadened to an epic scale.

This Tweet perfectly frames the article about the puzzle:

The article weaves a tale of the hunt that should take you from "mildly impressed" to "mind blown" by the end of it. If you're a fan of escape games, treasure hunting, or geocaching, it's a must-read!