ULTRAKILL, but it's the entire game in 16 minutes

MANKIND IS DEAD. BLOOD IS FUEL. HELL IS FULL. ULTRAKILL is a fast-paced ultraviolent old school first-person shooter developed by Arsi "Hakita" Patala and published by New Blood Interactive. You play as V1, a combat machine fueled by blood who has ventured into the depths of Hell after the extinction of humanity. Hell abounds with demons and tormented souls, sources of blood that you must rend apart in order to refuel yourself and survive. ULTRAKILL's gameplay combines features from classic shooters like Quake, modern shooters like Doom (2016) and character action games like Devil May Cry. The game places emphasis on movement, dodging attacks, and efficient gunplay in its arena-style levels. In addition, the player's health can only be restored by showering in the blood of enemies, requiring the player to adopt an aggressive playstyle that regularly places them in close combat with their opponents.