Game not being updated on GOG compared to other versions? Missing languages or DLCs? Post about them here and let me add them to the list. Please add a release date for the earliest missing patch if possible.

Link to google sheets version of the list.
https://docs.google.com/spreadsheets/d/1zjwUN1mtJdCkgtTDRB2IoFp7PP41fraY-oFNY00fEkI/edit?usp=sharing

Special Mentions

88 Heroes
Has never been updated here ever since its release back in March 2017. As a result, it's missing both the free DLC "RSG Champions" and the paid DLC "H8 Mode Activated."

Botanicula + DLC
GOG offered an exclusive pre-order deal for this game. Come release day, Botanicula was featured in a Humble Bundle at the "pay what you want"-base tier with extra content not offered for the GOG version.
The Humble-exclusive bonus content showed up 5 years later without a free upgrade for GOG users.

Nuclear Throne:
This game was released on December 5th, 2015. The GOG version has yet to receive a single patch.
Missing Linux version. Missing daily and weekly challenges, that are still being advertised as coming in the future.

Party Hard
Gog version is missing the level editor as well as the "High Crimes" DLC. The sequel has now been released here despite these issues.

Perception
Never updated since release, not even fixing a game breaking bug near the end of the game and having us miss out on various other features. Has been removed from GOG after a long time, the developers could no longer be bothered pretending.

Samorost 2 On sale for $0.99 on Humble only one day day after releasing it on GOG at full price.

Serial Cleaner:
Intentionally released a Steam exclusive update 29 November 2018.
https://steamcommunity.com/games/522210/announcements/detail/1707324367079997967

Republique

Riot: Civil Unrest

The missing achievements list is done, thank you Alexim for your hard work.
https://docs.google.com/spreadsheets/d/1pDO6WTHLHyrrtidQ1MAxW6u8j3BxUaGcFaJsVyWj2QY

Thank you Fronzelneekburm for originally creating the first version of this list.
https://www.gog.com/forum/general/suggestions_wanted_for_gog_mix_games_that_treat_gog_customers_as_second_class_citizens/page1

A special thank you to the following people for helping in maintaining the list.
Alexim;
EITerprise;
PookaMustard;
Rosalumina;
Sanfueg;
Solus/Snolus;
Zeogold.

Nonreserved post

Contact:
Easiest way to contact me is via Discord, below an invite to the unofficial GOG server I moderate.
https://discord.gg/v3UFvvY

My GOG PMs are open to anyone, feel free to contact me there, though response time might be higher.

Reserved for later use.

Thanks for lifting that burden off my shoulder! +1 and my best wishes!



Also, I think you can take Guacamelee! and Amnesia off the list.

Yup, already working on a few changes to make this mess more readable. ;)

You missed Planet Nomads. They moved their forum to steam.

Moved their forum to Steam?

Please update this to "over a year ago". Two months doesn't really sound all that bad.

I'm fairly certain Majesty Gold HD got all updates a few days ago and should be taken off, with Majesty and Guacamelee updated there may still be some hope for other games.

gah your avatar is both terrifying and beautiful.

The note for Starbound currently reads as gibberish.

Interesting thread. Thanks!