I really struggled with this matchup. I enjoy playing Katamari more. I like its cheerful vibe more than Doom’s. And that amazing Shibuya-Kei soundtrack really opened my mind to a lot of cool music.
But I really just have to cast my vote for Doom for one reason: it was set up in a way that made it possible for players to create their own maps, and the creators encouraged it. Over the decades, this has led to extrapolations on the original game that have completely blown my mind.
I mean, a few months ago I randomly stumbled into one of the wildest things I’ve ever seen in games: an active fishing/roleplaying mini-MMO called Community Hotel running on a Doom multiplayer fan server. Just check this out, seriously: DooM - #930 by OneSecondBefore
It is just incredible to me that something like Doom could transform into something like that.