Update:
Graven is very much a Hexen 2 spiritual successor. Still in early access, but shaping up nicely now.
— Dominic Tarason (@DominicTarason) March 29, 2023
Viscerafest, also in early access, is incredibly fast and twitchy, relying on fast weapon switching and melee.
The Citadel is like an early 90s hypergore anime OVA as an FPS.