the first paid downloadable content (dlc), "secrets of dr. wu", was released on november 20, 2018. the dlc introduced new story missions, research options and new dinosaur and hybrid species. on the same day, frontier introduced new ai behaviors and a day-night cycle into the game via a free update. frontier released the cretaceous dinosaur pack and the carnivore dinosaur pack in december 2018 and april 2019 respectively. each dinosaur pack introduces three new dinosaurs species. a paid dlc titled "claire's sanctuary" was released on june 18, 2019. set after "fallen kingdom", the expansion features a standalone campaign which sees players relocating the remaining dinosaurs trapped on isla nublar to sanctuary island.