Destructible demons

Destructible demons is a new gore system featured in Doom Eternal, first featured in the QuakeCon keynote presentation on.

Details
Destructible demons is a visual and mechanical system in which enemies dynamically reflect the amount and types of damage they receive from the Doom Slayer. This changes how the game plays by adding the ability to cripple certain weapons available to enemies, making them useless to that particular demon. An example as pictured to the right is the ability to destroy the arachnotron's plasma cannon.

The true lengths of this system are not yet known, as concept art of the Pain Elemental shows its eye destroyed. It is not known if this will affect a demon's vision, as Cacodemons and Mancubi in Doom 2016 could have their eyes destroyed with little affect on the enemy behavior.

An interesting note is that the Hell Knights, which otherwise appear very close to their 2016 counterparts, can have their faces blown off to reveal a yellow skull and eyes.