Could be some WADs ported to one of the open Doom engine emulators?

Lol, that's not even close to Doom, Doom has 3rd dimension, platforms of different heights.
This engine is similar to https://steamhost.cn/app/2270/Wolfenstein_3D/
Other games used that engine as well, and some still appear using its open-source clones.

Compare to https://steamhost.cn/app/358190/Blake_Stone_Aliens_of_Gold/ from the 90s

https://steamhost.cn/search/?developer=Drop_Dead_Fred%20%28%D0%A4%D1%80%D0%B5%D0%B4%29
some more examples

Hi there *Yuki*, I've changed your post title as it seems more appropriate. I understand that you are asking if anyone knows if there is an asset pack/asset for this but the title was a little inappropriate and as such, I have changed it to fit the question more.
If you have any issues or would like to discuss the change feel free to add me.

http://www.moddb.com/engines/raycasting-game-maker

This is the engine.
Packs can be found floating around.

Nothing personal and rather due to my age, but I die inside every time someone calls "Doom clones" those Wolf3D clones...

Anyway, most if not all of those seem to be running under this engine:
http://www.moddb.com/engines/raycasting-game-maker

Western FPS and German Fortress 3D have been previously mentioned in this group; the former uses a free asset pack so specific it may have been made with that engine in mind. Dunno about the rest but given that engine is very easy to use and limited, and their overall low quality, it may rather be a case of serial lazy development.

A game that does not deserve to be confused with them is Cthon. The only thing in common is being made with Game Maker and the simple floor structure. Beside that, it's made with much more effort.

Originally posted by DaveQB:

Nothing personal and rather due to my age, but I die inside every time someone calls "Doom clones" those Wolf3D clones...

That was my renaming the question, I agree they're more Wolf3d clones due to the way the engine works but I grew up in the era of Doom Clones so I'm very used to it. Back when they actually were games using the Doom engine and recreated sprites.

updated post with suggestions about wolfenstein. The deal was - I didnt even play it. Yet spent some time in doom, back in days. Thats why I originally called them "doom clones"

I don't know about the art in those games (seems original to me right now), but I know that Cyber Utopia uses Midis of "professional music". And I doubt they've asked the creators if they might put it into their game.

Originally posted by Osselpi:

I don't know about the art in those games (seems original to me right now), but I know that Cyber Utopia uses Midis of "professional music". And I doubt they've asked the creators if they might put it into their game.

If you'd like to start a new thread about it I'd be happy to forward it to Mellow or another researcher for the sentinels.

https://steamhost.cn/app/848670/You_Green_Elephant/
"and another one" (c)

Lol, yet another game based on the underground gore movie Green Elephant

Originally posted by Ryuu:

Lol, yet another game based on the underground gore movie Green Elephant

there are lots of them, tbh

Originally posted by *Yuki*:

Originally posted by Ryuu:

Lol, yet another game based on the underground gore movie Green Elephant

there are lots of them, tbh

That's what i said

https://steamhost.cn/app/846250/Devious/

this one seems somehow good, btw