Someone posted a link to his similar game database in this forum maybe 1 year ago. you could search for release time, genre etc. find all games of this type. The database contained not only GOG but all games ever published. It was very useful.

I lost the link, does anyone remember this page?

I know I wrote in this thread but If I search for my posts:
Sorry, but you haven't posted in the forums recently
wtf gog

EDIT
Wow I found old post with Google-search:
site:https://www.gog.com/forum/general "surfersurfer"

Thread link:
https://www.gog.com/forum/general/gane_list_generator/page1

Database link:
http://www.similartype.com/?x1=0

I searched for the game that I'm currently playing (Star Wars: The Force Unleashed) and it's not even in that DB! (TFU2 is)

My favorite remains Moby Games... (while also not 'perfect')