Shooter
To make things even more weird, all MechWarrior and MechCommander games are merged into one title which now dominates the list.
SWAT 4 now has more votes than Aliens vs Predator 2.
Hexen games were merged and entered the list from #7.

MechWarrior 3 and MechWarrior 2: 31st Century Combat left the list (as separate titles).

Action/Platformer/Puzzle
Racing/Sports/Fighting
RTS/Turn Based Strategy

Good thread but why group these together?

to keep things simpler :)

Action/Platformer/Puzzle
There was some manipulation in this one. Silent Hill games were merged and moved to #1, but under the name "Silent Hill 2+3+4". In other words, thousands of votes for the original Silent Hill were removed. To keep things fair, I included the original Silent Hill on my list. The game had more votes than all other titles anyway (with the exception of Silent Hill 2).

Resident Evil 1+2+3 were merged and thereby entered the list from #3.

Silent Hill 2 and Silent Hill left the list (as separate titles).

Good News! (the free (as in freedom) Good News, not the Good News™) There are at least two very positive changes to the Community Wishlist:
https://www.gog.com/forum/general/fixed_community_wishlist

The change is understandable because there was no PC version of Silent Hill 1.

waow I am genuinely shocked! I revised the list, thanks :)

A clear statement that GOG does not plan to support games for emulated Japanese consoles.

Crowdfunded
RimWorld entered the list from #5, pushing Shantae: Half-Genie Hero out.

long silence for the most requested games :)

RPG
The Elder Scrolls IV: Oblivion now has more votes than Final Fantasy VIII.
Fable, Fable III now have more votes than Dungeon Siege.

Action/Platformer/Puzzle
Mafia climbed from #9, 3 positions up to #6.

Adventure
Dune now has more votes than Discworld

RTS/Turn Based Strategy
Civilization II now has more votes than X-COM: Enemy Unknown – Complete Edition.

Crowdfunded
RimWorld climbed from #5, 2 positions up to #3.