Gameplay footage from Hades 2. Actual gameplay begins at 1:58.
Hades 2 is a sensational Brazilian first person shooter developed on the Acknex engine, incidentally the same engine used for The Varginha Incident. I don't believe the "2" in the title is meant to signify it as being a sequel to anything, however.
Note: Due to some recording issues, I was forced to use keyboard-only controls as opposed to the much more robust mouse-aiming controls. As a result, this video makes the game look much harder than it really is.