Id Software has a unique way of keeping the Doom series fresh. It does so by changing the fundamental fighting style of the Slayer. Of course, it's still a first-person shooter, but the procedure to maximize the number of kills is different in every entry. In Doom: The Dark Ages, the shield saw and the flail are your go-tos when it comes to finishing off enemies.
This unstoppable killing machine is more than meets the eye in Doom: The Dark Ages.
One of the biggest differences between the last two games and this one is the absence of Glory Kills, at least for low-level enemies. These few seconds of cinematic gore gave players a breather and some health. The devs probably felt that it wouldn't suit the gameplay loop of the latest entry. However, it seems some fans have an in-universe explanation too.
Given when Doom: The Dark Ages is set, the Slayer is still relatively young when compared to himself in the 2016 entry and Eternal. Even his face looks much younger than most fans expected. So, while the devs removed glory kills for most enemies for gameplay reasons, one Redditor has decided to theorise...