Deep Fear is a Saturn exclusive survival horror game published by Sega in 1998. It’s basically a shameless Resident Evil clone, and someone obviously thought: “let’s cross Resident Evil with The Abyss” and came up with this underwater adventure.
You play an emergency chief on an underwater fuelling base and must investigate why a submarine has crashed into part of the rig, and why some people are suddenly transforming into disgusting monsters and attacking the crew.