The DOOM challenge is one of my favorites so far. Probably because the entries remind me of a time when I started to become more fascinated with graphics and game development. Doom was an inspiration for me, and I'm sure many others.
Congratulations to all who managed to complete the challenge! It's always cool to see members in the community complete projects like this, and some of these entries turned out more "complete" than we might have expected for 2 months of development. Here's the list of completed projects, in no particular order:
Owl Shooter (Manager Killer)
Unity-based Doom-like gameplay with Steam release plans.
Unpolished, programmer art based on a custom Doom-like engine.
Member: @Vilem Otte
Custom path tracing renderer DOOM experience with custom art.
Project page: https://www.gamedev.net/projects/835-doom/
Blog postmortem: https://www.gamedev.net/blogs/entry/2268070-doom-post-mortem/
Godot engine based
Project page: https://www.gamedev.net/projects/1870-pulsehazard/
Blog postmortem: https://www.gamedev.net/blogs/entry/2268071-pulsehazard-postmorten/
small3d framework based Doom-style game with 3D models created in Blender.
Project page: https://www.gamedev.net/projects/1863-gloom/
Blog postmortem: https://www.gamedev.net/blogs/entry/2268060-doom-fall-2019-challenge-participation/
Very Doom-like experience clone.
Project page: https://www.gamedev.net/projects/1758-doomish/
Blog postmortem: https://www.gamedev.net/blogs/entry/2268019-doomish-done/