Isaac Clarke is the main character in the popular survival horror video game series Dead Space. He is a skilled engineer who finds himself battling terrifying creatures known as Necromorphs while trying to uncover the mysteries surrounding the Marker, a mysterious alien artifact. Isaac's journey is marked by intense psychological horror and a struggle for survival in a nightmarish environment. Throughout the series, Isaac evolves from a reluctant hero to a determined survivor, facing not only external threats but also his own mental demons. His character is known for his resourcefulness, using engineering skills to craft weapons and tools to combat the horrors he encounters.