I would recommend GZDoom for heavy modding of the game.
If you want an experience as close to vanilla classic doom as possible, use PrBoom or Chocolate Doom instead.

All you need to do is copy and paste all the source ports files into the base folder, and rename the executable to dosbox. Delete default dosbox.

This place right here, i'm sure you recognize it.

You want to edit either the doom 2 + mouse or doom 2 batch files, depending on which one you want to launch. In most cases, you want the doom 2 + mouse batch file.
Once you're in the editor, the default code is something like this
.\base\dosbox -conf .\base\doom2m.conf -fullscreen -exit

Remove everything, leave the .\base\dosbox part

Now, I wanted to run Eviternity.wad and Project Brutality 3.0 both at once through Steam.
What you need to do is simply write -file and then just enter the names and file formats of your mods, and save. Then launch through Steam and it should work.

So, since I wanted to run both Eviternity and Project Brutality 3.0, I entered this:

.\base\dosbox -file Eviternity.wad Project_Brutality-master.zip

Then just save and launch.


Remember to choose to launch the dos version of the game when launching through Steam.

Note: this might not work with all mods. For example, mods that can't be installed with a simple drag and drop are likely not going to work with this. Also, if the WAD you want to play is located in a zip folder, unpack the zip file and copy paste the wad into the doom 2 folder.

Hello, I apologize if someone already has made a guide for this, I just figured i'd put it together quickly to help out some people who were asking.


Enjoy your demon slaying!