"Ratman" is a character from the video game series Resident Evil. He is a mutated creature that appears in the game, known for his rat-like features and aggressive behavior. Ratman is often associated with the Umbrella Corporation, the fictional company responsible for the creation of various bio-organic weapons. In the Resident Evil lore, Ratman is linked to the underground areas of Raccoon City, where he leaves behind notes and clues about the events occurring in the city. His character adds depth to the game's storyline, highlighting the consequences of the experiments conducted by Umbrella.