Fallout co-creator Tim Cain says "leaving some mystery" and undeveloped lore in games is important so players are keen to play follow-ups and sequels: "If you tell everything, players will want nothing"

Fallout .

Fallout co-creator Tim Cain says it's important to leave breadcrumbs of unsolved lore in games so players are interested in it expanding in the eventual follow-ups.

In a YouTube video titled "Leaving Some Mystery," Cain offers some advice: "Don't feel like you need to address every question the player might have." As an example, he says, "In Fallout, we didn't address what Harold was. We didn't need to, wasn't important to the story, isn't important to the setting. It's a fun mystery."