Just the download for the D00M Aesthetic Mod for you!
Simply extract it to your Half-Life folder and run (1. Half-Life Won: Go to custom game and click on the game. 2. Half-Life Steam: Go to your launch options and put -game doom_valve )
Includes all aesthetic models and music for main menu.
it is not an addon
I'd love to try my hand at maybe modeling the full weapons for viewmodels, as a lot of weapons aren't fully modeled enough for the whole DooM aesthetic to work on them without seeing the Void.