It includes complete walkthroughs for every map of every doom game. It includes story background, history, speedrun paths and instructions for all secrets on all maps. The only drawback is that secrets are explained with text.
This is a great site for Doom 1 and Doom 2 resources. It includes the maps of all episodes with options to display keys, teleports and secrets. Secrets and teleports are displayed visually on the maps.
Useful site with many reviews of the common WADs
You can find pseudo 3d projections of the maps.
I do not include links since they might change in the future, but if you google them you will easily find sites to download them.
- Smooth Doom – It includes only visual improvements. No gameplay changes
- Beautiful doom – It includes visual improvements. It also includes new weapons and some minor game play changes but they are mostly optional
- Knee deep in zdoom – Imho a totally different game, but you can check it out
There are numerous other mods and WADs. I only include those I like.