10 Video Game Bugs That Became Features

4. The Spy - Quake Team Fortress

In 1996, a small group of Aussies made Team Fortress, a mod for Quake. Within this mod there was a glitch where a player's name could show up as the wrong colour, making it look like said player was on the opposite team than they actually were.

In this case, the bug was an easy fix and it didn’t indeed get fixed, but that’s not the end of the story.

The devs were inspired by the glitch to create a character class based on deceiving the opposite team into thinking they were a member of it. And thus The Spy was born within an update called QuakeWorld Team Fortress, capable of impersonation and very literal backstabbing. Of course, this class would eventually carry forward into Team Fortress 2 as well.