Doom like games

Project Warlock maybe?

I know it isn't what you are looking for but this is a very fun game.

https://akselmo.itch.io/penance

Do you remember some details about the game which might help us help you find it?

Maybe Hellbound

https://store.steampowered.com/app/753590/Hellbound/

Maybe you can check here
https://www.fanatical.com/en/blog/doom-like-indie-steam-pc-games-you-need-to-play

Maybe it was one of the Heretic or Hexen games?

https://store.steampowered.com/sub/439/

Do you happen to know the approximate date of the bundle?

Hedon maybe?

My best guess (excluding ones already mentioned) would be Devil Daggers: https://store.steampowered.com/app/422970/Devil_Daggers/

It's been in a whole load of bundles so far though^^

Edit: Maybe Gates of Hell: https://store.steampowered.com/app/1136420/Gates_of_Hell/

Although that one seems like a simple beat the waves game.

maybe this
https://store.steampowered.com/app/1286350/BPM_BULLETS_PER_MINUTE/

https://store.steampowered.com/app/519860/DUSK/ Not sure if it was in the bundle you're on about, or if it's been in any fanatical bundle at all, but it's a damn good game regardless.

I remember this game being in at least a couple of Fanatical bundles:
https://store.steampowered.com/app/457210/SEUM_Speedrunners_from_Hell/

If you like Doom I recommend Shrine and Shrine 2. Both are free and on Steam.

Crimsonland has box art reminiscent of Doom, are you thinking of that?

My favorite is Shadow Warrior

Could be Ziggurat?
https://store.steampowered.com/app/308420/Ziggurat/

Don't think it was in a bundle, as it's new, but possibly Prodeus?

You can also try mods for Doom games, you can find on moddb.

https://youtu.be/dXCOKpJcYZU

here ya go, they talk about those '90s shooters, there is quite a lot of them