I was on E2M6 before work got extremely hectic and I put it on pause for a while. Now that I’m finally getting back to it, I love it so much. It combines two things I love: boomer shooters and Warhammer. To extend my playthrough, I'm playing it how I play classic Doom: Boltgun start only, no saves (death means I start the whole level over), and Exterminatus difficulty. It's gotten challenging but I love the mastery that comes from playing a map from the beginning again.
Any boomer shooter fan is doing themselves a disservice if they don't check it out.