>>382379202
>>382400118
A lot of the radius lore and many of the recordings you'll find in game were actually posted four years ago as part of a blog written "in-setting" and obviously run by the devs as part of the game's pre-release hype:

https://intotheradius.tumblr.com

yes it's tumblr who cares it's official ITR stuff

It's worth reading over as part of your journey though the game, since even the ending will leave you somewhat confused. there's some minor spoilers and some lore has changed since then, but it's pretty interesting.