I got curious and looked for info about Culpa Innata, and what I found is pretty intriguing and I feel I need to share.
1. The novel Culpa Innata is based on is actually two novels ("Kabus"/"The Nightmare" and "Rüya"/"The Dream") that form one work ("Schrodinger's Cat"). They were written by Alev Alatlı in 2000. I think they're only in Turkish, so you'll need to get them translated if you want to read them.
Don't confuse those novels with the official Culpa Innata novelisation written by Burak Barmanbek that released in 2012, though. They're seperate works. That tripped me up before I double-checked what the credits said, so just wanted to clarify so you don't make the same mistake.
2. Culpa Innata's website is still running, and recieved a major overhaul that began in December 2022 and was finally released in August 2023, according to the official Culpa Innata Instagram page. The website is written from an in-universe perspective, and features tons of art, lore, an official wiki, all sorts of stuff.
Their Instagram has similar in-universe art and lore, and they've been posting pretty consistently since December 2023. Their most recent post was three days ago. I'm not sure why; there aren't any links to books or games or anything like that.