This is in progress.
I would like to add genre and year.
I might remove games or add them as I check how much actual spoken lines are there. Let me know if you think a game in the list doesn't have so much actual voiceover to be included. Many audio tags in the GOG cards are clearly fake and present for games that barely have a few spoken words in it.
The game must be sold with German dub as is on GOG to make the list, without the need of patches.
Games that have to be modded to have German dub are listed in post 11 down here. If you think a game belongs to this list please comment and let me know.

note to self, check/add, GSC Game World, 1C Entertainment, Hasbro, Egosoft

https://docs.google.com/spreadsheets/d/1THeV90sLaW6bHYOmRq-GsidqoPx7bJ6TfExmybNNQ_k/edit?usp=sharing

title is "russian dub". maybe ask a blue to fix it?

Such a list does exist already:
https://www.gog.com/forum/general_de/spiele_mit_deutscher_version_auf_gog/page1

damn nope, this list you are linking includes games that have German TEXT, often just menus. I'm making a list of games that must have "enough" spoken content for me to want to include them. Not just spoken menus or a few sentences.

The list showing games with german audio starts here:
https://www.gog.com/forum/general_de/spiele_mit_deutscher_version_auf_gog/post5

Again, 140 for example hardly has any word in it. AER – Memories of Old is a mute game XD
I'm making my list thanks. You are free to ignore it, gute Naaaacht :)

other lists
Russian dub
https://www.gog.com/forum/general/games_with_russian_dub

Japanese dub
https://www.gog.com/forum/general/games_that_have_japanese_dub

+1!!
Would be possible to include Spanish too please?
Thanks in advance Dogmaus!

I plan to make one for Chinese fist, and I'm not learning Spanish myself so I don't know if I would do it, sorry. Thank you, for some reason I stopped at Gothic. :)

Games that can be patched to have German dub
EDIT
I have realized that here you find a list of games you can patch with the audio, and alll the occurent, so we can refer to it
https://www.schote.biz/sprachdateien-deutschpatches/14-ABCD.html

So here I'll be adding titles as a reminder for myself, but not games I am not interested

Alan Wake
Arabian Nights
ArcaniA
Arcanum: Of Steamworks and Magick Obscura - Arcanum: Von Dampfmaschinen und Magie
Ankh 2: Heart of Osiris - Ankh: Herz des Osiris
Ankh 3: Battle of the Gods - Ankh: Kampf der Götter
AquaNox
AquaNox 2: Revelation
A Vampyre Story
Haegemonia Gold Edition
Lands of Lore: Guardians of Destiny - Lands of Lore II
Memoria
Noctropolis
Phantasmagoria
Phantasmagoria 2: A Puzzle of Flesh
Pajama Sam 2: Donner Und Blitz Machen Mir Nix - Pajama Sam 2: Thunder and Lightning Aren’t so Frightening in Pajama Sam Vol. 1
Pajama Pit: Keine Angst im Dunkeln - Pajama Sam: No Need to Hide When It's Dark Outside - in Pajama Sam Vol. 1
Revenant
Runaway: A Road Adventure
Runaway 2: The Dream of the Turtle
Runaway 3: A Twist of Fate
Sanitarium
The Dark Eye: Chains of Satinav
The Next BIG Thing
Venom. Codename: Outbreak

Added Starship Titanic, I kept confusing it with Titanic: Adventure Out of Time, that is English only! Turns out, they are two different games!

never got why would anyone use these lists
first it is probably not up to date , hard to update is on a 3rd rate gaming forum where search is bad

so why would anyone use this instead of just search for it on duckduckgo if they want so specific game list ?