The Dead Space Remake brings a lot of fantastic upgrades with it, including a secret ending. Originally, the game's protagonist, Isaac, got jumped by a hallucination of his girlfriend Nicole as he escaped Aegis VII. However, as the game has become its own franchise, the remake has created an alternate ending to explain how Isaac survived this seemingly deadly encounter and continued to the sequel.
https://screenrant.com/how-to-get-secret-ending-dead-space-remake/