There should be no disagreement: Doom is one of the best games ever made. I like to describe it as a perfect killing engine. Every part of it works in concert to create something you just want to deal death in. Over and over again. Its fast, violent, uncomplicated, but deceptively nuanced. Two decades later it still holds up because every piece of it pushes toward its goals.

That doesnt mean there is no room for modernisation or improvement. Mouse look, engine fixes and modern level design via custom-made map packs are a massive boon to playing Doom in the 21st century. But there are some modern shooter tropes that would be unacceptable - not objectively awful, but desperately 'not right' for Doom - if added. Ive picked out a few that would be especially heinous crimes if visited on ids reboot. Pray that none of these turn up when the game is revealed at Bethesda's press conference at E3 2015.