Characters use gaming terminology in-mythos. Commonly dungeons and quests pop up in strange places.
The first video game about Game terminology was released in 2007.
Kalypso Media Digital has published all these games
A common mistake (besides dungeons and quests) that causes this is when people ask if a person was damaged instead of hurt. Objects get damaged, people get hurt, but the stat that does this to both is "damage" and it gets propagated more than it should.
See the terminology article for examples.