We should try to get his statistics thread stickied ^^
EDIT : Found it!
https://www.gog.com/forum/general/this_years_releases_on_gog/post68 Relevant extract (I hope JMitch don't mind. Otherwise I'll edit my post
And the yearly data:
July 1st, 2008 till June 30th, 2009
GOG Released 128 games. Out of those, 58 (~45%) were pre-2K ones.
July 1st, 2009 till June 30th, 2010
GOG Released 101 games. Out of those, 42 (~42%) were pre-2K ones.
July 1st, 2010 till June 30th, 2011
GOG Released 71 games. Out of those, 1 (~1.5%) were Day 1 games, 34 (~48%) were pre-2K ones, and 39 (~55%) were 10+ years old.
July 1st, 2011 till June 30th, 2012
GOG Released 116 games. Out of those, 5 (~4%) were Day 1 games, 52 (~45%) were pre-2K ones, and 66 (~57%) were 10+ years old.
July 1st, 2012 till June 30th, 2013
GOG Released 171 games. Out of those, 39 (~23%) were Day 1 games, 46 (~27%) were pre-2K ones, and 64 (~37%) were 10+ years old.
July 1st, 2013 till June 30th, 2014
GOG Released 192 games. Out of those, 67 (~35%) were Day 1 games, 37 (~19%) were pre-2K ones, and 45 (~23%) were 10+ years old.
July 1st, 2014 till June 30th, 2015
GOG Released 261 games. Out of those, 81 (~31%) were Day 1 games, 40 (~15%) were pre-2K ones, and 62 (~24%) were 10+ years old.
July 1st, 2015 till June 30th, 2016
GOG Released 309 games. Out of those, 103 (~33%) were Day 1 games, 56 (~18%) were pre-2K ones, and 81 (~26%) were 10+ years old. 17 games entered InDev and 2 InDev were released.
So to make this short : we had more "old" games added on catalog this year than at any moment of GOG's history.
It's just that we also have a lot of new releases, and the oldies tend to come in massive batches when a new publisher comes on board