You can (kinda) play the metal-medieval romp early via a mod for the original FPS classic. Doom mods pretty much ... sharp pieces back out at underworld enemies? Here, too. Medieval architecture?

You get the guns, the Shield Saw, and some of the finer gameplay features, but all in the classic Doom Engine, with the maps from the 1993 original and its 1994 sequel. Some of the enemy models ...