You are trapped in sewer. Find and collect 8 Notes and get out. It wont be easy as is sounds. Sewer is hunted by Evil Entities. They look like fuzzy toys, but they are not! Good luck!
Controls
W A S D to walk around Mouse to Look around Left Mouse Button to Fire Right Mouse Button to Aim Mouse Wheel To Change Weapons G for Grenades R to Reload F to Pickup Left Shift to Run Left CTRL to Crouch X to Prone Space to Jump