Looking for some retro style first person shooting action, then take a look at Dread Templar which is available now via Steam Early Access or GOG.

Dread Templar is a fast-paced retro FPS that combines 90s classic shooter elements with modern skill-based FPS controls. You are a Dread Templar who entered Hell seeking revenge. But in order to get it, you have to fight your way through the dark realm!