If you put Id Software's Steam library of its classic games next to the map of the Bermuda Triangle, you wouldn't be able to tell the difference.
Id Software's labyrinthian list of games is not beginner-friendly. Thankfully, the long-time FPS-centric studio is changing this. The developers just confirmed that it's consolidating the various versions, expansions, and missions packs of the older Quake and Doom games. The result is a singular package that aims to give newbies who stumble upon their games "an easier time."
So, if you're a more seasoned FPS fan who hasn't picked up the earlier Doom games because there are separate entries in your Steam library, this is for you. The changes will make it so that you now have a single entry for Id Software's older FPS games and even install them at once.
Don't worry. The confusing versions and names are still going to be around. These packages will only bundle the separate entries under one game. This way, you'll choose the version only after you launch your preferred game. This might come at the expense of much larger install sizes, but since these are '90s games we're talking about, you won't even notice the difference.