The gloriously-named ZaziNombies YouTube channel creates LEGO versions of video game weapons, among other things. Somehow they have gone five years without building Doom's famous BFG 9000. Maybe it just took them a while to gather the 5,000+ bricks.
I've played plenty of Doom in my day, from the original shareware to the most recent re-releases, and I think it's time for a change. The talented Ochre Jelly's masterfully built LEGO Doom should do nicely.