Is it legal to make a new IWAD using shareware doom?

[BUYXRAYS]

I've been wanting to create my own IWAD using the shareware version of Doom 1 as a foundation.

However, I'm unsure about the legality of doing something like this.

Chex Quest did something similar, but I want to make sure that my project is entirely legal.

[Redneckerz]

26 minutes ago, BUYXRAYS said:

I've been wanting to create my own IWAD using the shareware version of Doom 1 as a foundation.

However, I'm unsure about the legality of doing something like this.

Chex Quest did something similar, but I want to make sure that my project is entirely legal.

This is a case of i have heard this before  and sure enough:

 

Relevant posts:

 

 

TLDR:

Basically, yes, with limitations, but the question should be: why?

[No-Man Baugh]

If you want a preexisting IWAD to use as a template to add on your own assets without getting into any hot water for missing a sound copywriten sound or sprite, then Freedoom should have you covered as it's covered under GPL so it's both free to download and to distribute, including as a totally seperate total conversion like Suburban Basketball did

https://freedoom.github.io/download.html

[kalensar]

The best option ever since it's been around since 2009 is FreeDoom. Before 2009 then the Shareware would have been the option, but now it's obsoleted. I haven't made a full game yet, but I've used Freedoom's freedom to enhance a few projects for compatibility reasons that similar in use to making a full game. 

[Edward850]

14 hours ago, No-Man Baugh said:

then Freedoom should have you covered as it's covered under GPL

It's covered under BSD. The easy way to remember this is you don't use GPL on things that aren't source code.

Edited August 5, 2023 by Edward850

[houston]

The shareware executable disables mod loading, so if nothing else I believe it is (or was) against Id's wishes.