Even if you've fully completed The Witcher 3, many of its secrets remain known only to its developers. Lead quest designer Paweł Sasko recently shared with a fan that one of the main story quests nearly broke him during development.
Sasko recalled "The Battle of Kaer Morhen", the large-scale main quest where Geralt and his allies defend Ciri from the Wild Hunt. According to his comment on X, the quest caused him significant headaches.
The hardest quest I have ever designed and implemented. Especially the technical part kicked my ass, so many custom solutions and branches. I was losing my mind and my sleep, when trying to put it together. Happy you enjoy it 🥰
Sasko also mentioned another quest from the Blood and Wine expansion, where Geralt discovers the Tesham Mutna armor. The designer confirmed that the armor’s design is a reference to the movie Dracula.