The Citadel First Look Gameplay PC HD

The Citadel is a first person shooter that fans of Doom, Marathon and Wolfenstein 3D cannot miss. Descend into the depth of a dark citadel and fight through 6 Episodes and 30 levels of action packed with 6 challenging bosses.
https://store.steampowered.com/app/1378290/The_Citadel/