I went through the entire galaxy vs. offline airtable and evaluated each as best I can, splitting them into four categories.
1) FX = Fixed Recently fixed by GOG. I expect these will disappear on the next airtable update.
FX 2021-09-03 1136126792 Absolute Drift osx 1.0g1 1.0g (c)
FX 2021-10-02 1301888900 Odd Realm windows 0.10.0.21 Production 0.9.0.13c
FX 2021-11-19 1441039809 X: Tension windows 2.3 1.0
FX 2021-12-09 1769244723 Wolfstride windows 1.0.6 1.1.1
FX 2022-02-01 1942260021 Afterparty windows 1.4.26f2 1.4.9
FX 2022-02-01 1942260021 Afterparty osx 1.4.26 1.4.9
FX 2022-03-10 1637485057 Unavowed osx 1.31 1.3a (GOG)
FX 2022-03-12 1104699058 Highrise City Demo windows 1.5 1.3
FX 2022-03-12 1890740105 Inua - A Story in Ice and Time osx 1.0.0 1.0.2.1
FX 2022-03-12 2033799141 Subverse windows 0.4.0 0.3.201
FX 2022-03-13 1168832459 ?V: Rings of Saturn osx 0.475.2 0.473.4
FX 2022-03-13 1232664301 Airships: Conquer the Skies osx 1.0.23.7 1.0.23.5
FX 2022-03-13 1432253578 PowerSlave Exhumed windows 1.0.1625 1.0
2) HE = Human Error What GOG calls a human error, resuting in outdated offline installers. I will
attempt to report these to GOG (again).
HE 2020-01-20 1118073204 Sphinx and the Cursed Mummy osx 2019.08.28 2019.03.26
HE 2020-06-23 2086192498 Indivisible osx 42940 42416r
HE 2020-08-13 1333227204 Double Kick Heroes osx 1.66.6027 1.66.6017
HE 2020-12-04 1449856523 >observer_ osx 20171102 20171014
HE 2020-12-26 1465732730 Wetlands osx 1.0 0.9.3c
HE 2021-03-20 1276221446 Altered Destiny windows 1.0 0.9.1
HE 2021-03-20 1382504295 XF5700 Mantis Experimental Fighter windows 1.0 0.9.1
HE 2021-03-20 1867297613 4th & Inches windows 1.0 0.9.2
HE 2021-04-10 1802257607 Aground Demo osx 2.1.1b 2.1.1a
HE 2021-04-10 1802257607 Aground Demo windows 2.1.1b 2.1.1a
HE 2021-04-16 2078946998 Close Combat: Modern Tactics windows 2021.4.20.1 2007.12.12.1
HE 2021-05-19 1955433774 Nongunz: Doppelganger Edition windows 1.2 1.01
HE 2021-07-09 1767144970 Ys IX: Monstrum Nox (Demo) windows 1.0.6 1.0.0
HE 2021-07-13 1238406305 Black Skylands windows v0.2.6 (ebeccfb195) 98506d3d01
HE 2021-08-20 1825786806 Quake II RTX windows 1.5 1.0
HE 2021-09-02 1422911599 Timespinner osx 1.033 1.031
HE 2021-09-07 2012631912 Rescue Rover Collection windows 1.01 1.0
HE 2021-09-28 1964276929 War for the Overworld osx 2.0.8f1 2.0.7f1
HE 2021-09-30 1928042073 Hedon Demo windows 2.1.2 Demo 2.0.0
HE 2021-10-30 1865815565 HordeCore: Training Ground windows 1.10 1.6
HE 2021-11-17 1718511445 American Hero windows 0.0.31 0.0.30
HE 2021-12-03 1116987509 Eastward windows v1.1.0c v1.1.0b
HE 2022-01-27 1618128477 Necromunda: Hired Gun windows 62662 61851
HE 2022-02-03 1503947102 Concordia: Digital Edition osx 1.2.2 1.2.0
HE 2022-02-03 1503947102 Concordia: Digital Edition windows 1.2.2 1.2.0
HE 2022-02-03 1963130333 Diplomacy is Not an Option Demo windows dno_2.0.6_demo dno_2.0.1_demo
HE 2022-02-09 1472462985 Din's Legacy windows 1.013 1.011
HE 2022-02-11 1207660263 The Shivah windows 2.1 2.0
HE 2022-02-11 2000476666 Songs of Syx windows 0.60.25b 0.60.25
HE 2022-02-14 1207659043 Resonance osx 2.3 2.2
HE 2022-02-14 1207659043 Resonance windows 2.3 2.2
HE 2022-02-14 1207662913 Blackwell Deception osx 1.4 1.3
HE 2022-02-16 1771589310 Disco Elysium - The Final Cut osx f9ca75e8 61ad72b0
HE 2022-02-17 1294162796 Fates of Ort osx 1.4.0b 1.3.1
HE 2022-02-25 2069785347 SHEEPO windows Sheepo1.1 Sheepo1.0
HE 2022-03-02 1679108862 Ghost on the Shore osx 1.1.4.8040 1.0.4.8006a
3) ID = In Development The newer galaxy version is not in the main branch, but rather in a
beta/indev/production/experimental/etc. branch (as indicated by the "Branch"
field of the galaxy build being set to some string). Since GOG stated that
they do not release beta builds on offline installers, these should probably be
removed from the airtable. You can either improve your algorithm by not
listing games where the newest galaxy build has the "Branch" field set
(better), or you can manually remove the games listed below (less better).
ID 2020-12-04 1953257763 Gary Grigsby's War in the East windows 1.12.06 Beta 1.11.03
ID 2020-12-04 2143654691 Heroes of Hammerwatch windows 106_test2 104
ID 2020-12-12 1445170412 Stars in Shadow windows 38803 (12/13/20) 38774 (08/09/20)
ID 2021-11-23 1444308510 Hammerting windows build2-tdtd-06964af_tdtd-patch-windows-dev build3-tdtd-06964af_tdtd-release_candidate-windows-release
ID 2021-12-15 1871006055 Little Nightmares II windows 1165 5.8
ID 2021-12-23 1711765822 Timberborn osx 0.1.2.1-c1267e3-xgm 0.1.1.1-db764df-
ID 2021-12-23 1711765822 Timberborn windows 0.1.2.1-c1267e3-xgw 0.1.1.1-db764df-
ID 2022-01-09 1207659172 System Shock™ 2 osx 2.48-update2 2.48
ID 2022-01-21 1176525525 Blade of Darkness windows v94 v89
ID 2022-02-03 1091815649 Colony Ship: A Post-Earth Role Playing Game windows 0.8.215a 0.8.206
ID 2022-03-02 1207659172 System Shock™ 2 windows 2.48-update2 2.48
ID 2022-03-04 1589675197 Space Haven osx 0.14.2 0.14.1
ID 2022-03-04 1589675197 Space Haven windows 0.14.2 0.14.1
4) TY = TYPO PROBABLY I suspect the two version (1.3 and 1.1.3) are the same, with the difference
only being a typo in the label of one or the other. I can't be sure, as I
don't own the game.
TY 2022-01-06 1536961491 Archvale windows 1.1.3 1.3