Take the core gameplay loop of the 2016 Doom game, turn it up to eleven, implement a forced weapon cycling with weak points and optimal engagement tactics to form one of the greatest FPS shooters of modern era.

Nightmare difficulty especially will challenge the living hell out of the experienced doom-slayer, with ammunition becoming a necessity and quick-switching guns becoming absolutely vital for survival against the new Marauder-type of enemies.

The DLC is a step up from the base game, with difficulty and fun ramping up.
First game I've ever completed on Ultra-Nightmare (one shot)