The Forgotten Crypt
The Forgotten Crypt is a 3D first person horror game in which you goal is to delve deeper and deeper into the lost catacombs you found yourself in. you will also need to survive. corpses will stalk you in the shadows while dehydration, the ever-changing rate of time and the tunnels shifting around you will be a constant threat.
Actually it's pretty shit, but it was made in a 48 hour game jam (the asylum jam), and its free!