I guess he's talking about a public changelog. Like on Steam.

If that's what he means, then, as we all know, he should probably look here:
http://www.gog.com/forum/general/public_change_log_for_all_games/post4

From MaGog's logs for 2 December:

NOTE! Probably CHANGED FILE Mini Metro, all_files, Linux installer, English

[GOG bug fix to the earlier update]

Thanks! Now I get the 2.2.0.4 version, although I'm also getting a MD5 checksum error... :(

From MaGog's logs for 3 December (part 1 of 2):

NOTE! CHANGED FILE Dreamfall Chapters [Season Pass], downloadables, Windows installer, English+French+German (part 1 of 3) (setup_dreamfall_chapters_2.8.0.11.exe ***TO*** setup_dreamfall_chapters_2.9.0.13.exe; 3.0.5.0 (gog-11) ***TO*** 4.0.3.0 (gog-12); Wed, 12 Aug 2015 08:34:13 GMT ***TO*** Thu, 03 Dec 2015 10:50:16 GMT; 34,967,728 ***TO*** 35,081,968)

NOTE! CHANGED FILE Dreamfall Chapters [Season Pass], downloadables, Windows installer, English+French+German (part 2 of 3) (setup_dreamfall_chapters_2.8.0.11-1.bin ***TO*** setup_dreamfall_chapters_2.9.0.13-1.bin; 3.0.5.0 (gog-11) ***TO*** 4.0.3.0 (gog-12); Wed, 12 Aug 2015 08:25:06 GMT ***TO*** Thu, 03 Dec 2015 10:59:45 GMT; no change in size)

NOTE! CHANGED FILE Dreamfall Chapters [Season Pass], downloadables, Windows installer, English+French+German (part 3 of 3) (setup_dreamfall_chapters_2.8.0.11-2.bin ***TO*** setup_dreamfall_chapters_2.9.0.13-2.bin; 3.0.5.0 (gog-11) ***TO*** 4.0.3.0 (gog-12); Wed, 12 Aug 2015 08:27:27 GMT ***TO*** Thu, 03 Dec 2015 10:59:46 GMT; 2,028,036,870 ***TO*** 3,806,235,393)

NOTE! REMOVED FILE Dreamfall Chapters [Season Pass], downloadables, Patch 3.0.5.0 (patch_dreamfall_chapters_2.8.0.11.exe; 3.0.3.0 (gog-10) -> 3.0.5.0 (gog-11); Wed, 12 Aug 2015 10:42:54 GMT; 346,337,848)

NOTE! CHANGED FILE Dreamfall Chapters [Season Pass], downloadables, Mac OS X installer, English+French+German (dreamfall_chapters_2.7.0.19.dmg ***TO*** dreamfall_chapters_2.9.0.21.dmg; 3.0.5.0 (gog-19) ***TO*** 4.0.3.0 (gog-21); Thu, 13 Aug 2015 09:42:30 GMT ***TO*** Thu, 03 Dec 2015 12:47:16 GMT; 6,536,338,869 ***TO*** 7,976,200,305)

NOTE! REMOVED FILE Dreamfall Chapters [Season Pass], downloadables, Patch 3.0.5.0 [Mac OS X] (patch_dreamfall_chapters_2.7.0.19.pkg; 3.0.3.0 (gog-18) -> 3.0.5.0 (gog-19); Thu, 13 Aug 2015 10:18:11 GMT; 356,472,299)

NOTE! CHANGED FILE Dreamfall Chapters [Season Pass], downloadables, Linux installer, English+French+German (gog_dreamfall_chapters_2.10.0.14.sh ***TO*** gog_dreamfall_chapters_2.11.0.15.sh; 3.0.5.0 (gog-14) ***TO*** 4.0.3.0 (gog-15); Thu, 13 Aug 2015 10:38:01 GMT ***TO*** Thu, 03 Dec 2015 11:53:47 GMT; 6,510,186,059 ***TO*** 8,020,346,729)

NOTE! REMOVED FILE Dreamfall Chapters [Season Pass], downloadables, Patch 3.0.5.0 [Linux] (patch_dreamfall_chapters_2.9.10.14.sh; 3.0.3.0 (gog-12) -> 3.0.5.0 (gog-14); Thu, 13 Aug 2015 11:05:50 GMT; 355,429,715)

NOTE! CHANGED Dreamfall Chapters [Season Pass], changelog (http://www.an-ovel.com/downloads/chg/chg_1207666503.htm)
NOTE! ADD +++ Patch 4.0.3.0 (3 December 2015)
NOTE! ADD +++ Added Book Four: Revelations

NOTE! CHANGED Dreamfall Chapters - Special Edition Upgrade [Season Pass] [DLC], bonuses: 7 HD wallpapers, soundtrack (), soundtrack (), 5 avatars, Reborn: The Art of Dreamfall Chapters Book 1, 2 Journeys Birth short stories (coming soon), Europolis tourist map ***TO*** 7 HD wallpapers, soundtrack (FLAC), soundtrack (MP3), 5 avatars, Reborn: The Art of Dreamfall Chapters Book 1, 2 Journeys Birth short stories (coming soon), Europolis tourist map [Finally. This has been bugging me for ages. The change also affects the titles of these soundtracks in one's library.]

NOTE! CHANGED Dreamfall Chapters [Season Pass], file_size: 5.9 GB ***TO*** 7.5 GB

NOTE! CHANGED Dreamfall Chapters [Season Pass], image: http://images.gog.com/1c557ffdb268cc0f2323a1570ea88588fef8e93c9e2bc22532f50a8d86d6ee5d_100.jpg ***TO*** http://images.gog.com/cb4636d216f72dfb8a7d28a068f6cae938ebab672efc540deffd145ada822a78_100.jpg

NOTE! CHANGED Dreamfall Chapters - Special Edition [Season Pass] [Premium], image: http://images.gog.com/9267f04ea359c6abcde3cc7009b6a3c0b24588ec5710258c8642cb9886e7d49d_100.jpg ***TO*** http://images.gog.com/eda22a0b2405bde4c9c1630e85ee9a80858e8cf8153590353d5d9abc175f6e8b_100.jpg

NOTE! CHANGED Dreamfall Chapters - Special Edition Upgrade [Season Pass] [DLC], image: http://images.gog.com/9338546f3b41677f17611ace520cf2116c040239cb5523ad9f63c2d3d66af8a9_100.jpg ***TO*** http://images.gog.com/24593b991f1cf58e33796e9d76f88bd812e68be64ea8845b5d7682248c48db9b_100.jpg





NOTE! Probably CHANGED FILE Fran Bow, all_files, Windows installer, English, dl_ver: gog-3 ***TO*** Version #3 (gog-4)

NOTE! CHANGED Fran Bow, changelog (http://www.an-ovel.com/downloads/chg/chg_1438948561.htm)
NOTE! ADD +++ Patch #3 (03 December 2015)
NOTE! ADD +++ This is an update for the Windows version only.
NOTE! ADD +++ Initial loading is a lot faster, graphics are only loaded when needed.
NOTE! ADD +++ More compatible to older machines and graphic cards. White boxes should dissapear with this update.
NOTE! ADD +++ NOTE: If you are experiencing slow gameplay, go to "Options and choose Shaders OFF.

From MaGog's logs for 3 December (part 2 of 2):

NOTE! Probably CHANGED FILE Invisible Inc., all_files, Original Game: Windows installer, English, dl_ver: build 20151112 (gog-5) ***TO*** build 20151202 (gog-6)

NOTE! Probably REMOVED FILE Invisible Inc., all_files, DLC compatibility update for existing installs [Windows]

NOTE! Probably ADDED FILE Invisible Inc., all_files, Patch 20151202 [Windows]

NOTE! Probably CHANGED FILE Invisible Inc., all_files, Original Game: Mac OS X installer, English, dl_ver: build 20151112 (gog-8) ***TO*** build 20151202 (gog-9)

NOTE! Probably CHANGED FILE Invisible Inc., all_files, Original Game: Linux installer, English, dl_ver: build 20151112 (gog-9) ***TO*** build 20151202 (gog-10)

NOTE! Probably CHANGED FILE Invisible Inc., all_files, DLC: Contingency Plan: Windows installer, English, dl_ver: build 20151112 (gog-5) ***TO*** build 20151202 (gog-6)

NOTE! Probably CHANGED FILE Invisible Inc., all_files, DLC: Contingency Plan: Mac OS X installer, English, dl_ver: build 20151112 (gog-8) ***TO*** build 20151202 (gog-9)

NOTE! Probably CHANGED FILE Invisible Inc., all_files, DLC: Contingency Plan: Linux installer, English, dl_ver: build 20151112 (gog-1) ***TO*** build 20151202 (gog-2)

NOTE! CHANGED Invisible Inc., changelog (http://www.an-ovel.com/downloads/chg/chg_1430744353.htm)
NOTE! ADD +++ Patch 20151202 (03 December 2015)
NOTE! ADD +++ With our release of the Contingency Plan DLC a few weeks ago, we've been reading the feedback from the Users, and have made some improvements and bug fixes to the Invisible Inc base game and the DLC.





NOTE! CHANGED FILE Lords of Xulima, downloadables, Original Game: Mac OS X installer, English (lords_of_xulima_2.3.0.13.dmg ***TO*** lords_of_xulima_2.4.0.14.dmg; 1.8.8 (gog-13) ***TO*** 2.0.4 (gog-14); Wed, 13 May 2015 14:42:01 GMT ***TO*** Thu, 03 Dec 2015 13:40:31 GMT; 1,547,498,164 ***TO*** 1,769,822,945)

NOTE! CHANGED FILE Lords of Xulima, downloadables, DLC: Deluxe Edition Upgrade: Mac OS X installer, English (dlc_lords_of_xulima_deluxe_edition_2.2.0.12.pkg ***TO*** dlc_lords_of_xulima_deluxe_edition_2.4.0.14.pkg; ***TO*** 2.0.4 (gog-14); Fri, 24 Apr 2015 09:18:50 GMT ***TO*** Thu, 03 Dec 2015 13:37:37 GMT; 219,438,843 ***TO*** 219,370,986)

NOTE! CHANGED Lords of Xulima, changelog (http://www.an-ovel.com/downloads/chg/chg_1420648167.htm)
NOTE! ADD +++ Patch 2.0.4 (03 December 2015)
NOTE! ADD +++ The OS X version of Lords of Xulima has been updated to version 2.0.4.
NOTE! RMV --- This is an update for the WIndows & Linux versions of Lords of Xulima.
NOTE! RMV --- The Mac version will be updated as soon as possible.





NOTE! Probably CHANGED FILE Mini Metro, all_files, Linux installer, English

[No changelog. Probably a GOG bug fix to the earlier update]





NOTE! Probably CHANGED FILE Satellite Reign, all_files, Windows installer, English, dl_ver: 1.06 (gog-7) ***TO*** 1.06.02 (gog-8)

NOTE! Probably REMOVED FILE Satellite Reign, all_files, Patch 1.06 [Windows] (dl_ver: 1.04.02 (gog-6) -> 1.06 (gog-7))

NOTE! Probably ADDED FILE Satellite Reign, all_files, , dl_ver: ***TO*** 1.06 (gog-7) -> 1.06.02 (gog-8)

NOTE! Probably CHANGED FILE Satellite Reign, all_files, Mac OS X installer, English, dl_ver: 1.06 (gog-5) ***TO*** 1.06.02 (gog-6)

NOTE! Probably CHANGED FILE Satellite Reign, all_files, Linux installer, English, dl_ver: 1.06 (gog-5) ***TO*** 1.06.02 (gog-6)

NOTE! CHANGED Satellite Reign, changelog (http://www.an-ovel.com/downloads/chg/chg_1428054996.htm)
NOTE! ADD +++ Patch 1.06.02 (03 December 2015)
NOTE! ADD +++ fixes some intermittent crashes as reported by users

[Note that the added patch doesn't seem to have a title]





NOTE! CHANGED FILE Unmechanical: Extended, downloadables, Linux installer, English+Danish+Dutch+Finnish+French+German+Hungarian+Italian+Polish+Portuguese+Russian+Spanish+Swedish+Turkish (no change in name; Wed, 02 Dec 2015 15:16:50 GMT ***TO*** Thu, 03 Dec 2015 11:47:30 GMT; 960,113,849 ***TO*** 963,780,604)

[No changelog. Probably a GOG bug fix to the earlier update]





NOTE! CHANGED Pid, age_req: ESRB Rating: Everyone 10+ (with Cartoon Violence). PEGI Rating: 7+ (with Bad Language, Violence) ***TO*** ESRB Rating: Everyone 10+ (with Cartoon Violence). PEGI Rating: 7+ (with Violence)

NOTE! CHANGED Sam & Max Save the World, age_req: ESRB Rating: Teen (with Cartoon Violence, Crude Humor, Mild Language, Use of Alcohol and Tobacco). USK Rating: Approved for children aged 6 and above. PEGI Rating: 12+ ***TO*** ESRB Rating: Teen (with Cartoon Violence, Crude Humor, Mild Language, Use of Alcohol and Tobacco). USK Rating: Approved for children aged 6 and above. PEGI Rating: 12+ (with Bad Language)

[Nothing changes...]





NOTE! CHANGED Armikrog - Deluxe Edition [Premium], image: http://images.gog.com/727edcc28bc6479459b7b5832f7a9e3ceef55bb34d3bcde8366963618f78e3a5_100.jpg ***TO*** http://images.gog.com/2e5bb46eec1cf66da2863d5d88ad524a967f51cc2a8b564f4a11abab2ec2a7e4_100.jpg

NOTE! CHANGED Convoy Soundtrack [DLC], image: http://images.gog.com/2965e2118cd8ad6a719399d87b10963d27e2009fb4e5cd0e7697a6dc9486b7f0_100.jpg ***TO*** http://images.gog.com/7a2602ac1e71d568f256949c68124a7ff28f6f337b7da5d7d4aaf953f24ea24c_100.jpg

NOTE! CHANGED Shelter 2 Special Edition [Premium], image: http://images.gog.com/29fc1cf79fc1319ae7607f9dc1f0a98a06ec9dcb388227ef9ec1803c285e5786_100.jpg ***TO*** http://images.gog.com/1190c992563ff0de9bcf90dc4a3e23bc0ef8f06daf918fb7bc656aa4bc3ea09c_100.jpg

NOTE! CHANGED Toren Deluxe Edition [Premium], image: http://images.gog.com/d88299dfcc630050b41ab9ab603304e012826c6fe827e679649f2691af571de8_100.jpg ***TO*** http://images.gog.com/dae60a8299961c7a9bccf0d8c53d028d321c14d1cc04a365eb2147557f182fbd_100.jpg

NOTE! CHANGED Transistor Soundtrack [DLC], image: http://images.gog.com/6c3127240e36ff0bbd2e95f86bb7c865043ac0b90484dc5f0fffbde355e03a5a_100.jpg ***TO*** http://images.gog.com/4061279329be22920824619801ff5c75f7d3fc271c32312a404b96256e116fd8_100.jpg

[I believe these image updates indicate these are upcoming daily deals.]

Stronghold HD

ok, so clicking the drop down arrow in galaxy was not showing a changelog.

web page, account, library clicking right drop down arrow shows no changelog

so, I click on the item icon, and behold a changelog.

I still stand by my original comment. The changelog buried where it is is not good and need to be moved front and center for updates. At least now I know that they do have such a mechanism, it's just placed in some assinine location.

Sid Meier's Alpha Centauri™ Planetary Pack

Of course, as a Linux user I get all flags for Mac and none for Linux.

Yeah, got it a few moments ago myself.


EDIT: And something tells me that I'll have to clear that flag three times before it stops showing.

From MaGog's logs for 3 December:

NOTE! CHANGED FILE Sid Meier's Alpha Centauri™ Planetary Pack, downloadables, Mac OS X installer, English (sid_meiers_alpha_centauri_2.0.0.9.dmg ***TO*** sid_meiers_alpha_centauri_2.0.0.10.dmg; gog-9 ***TO*** gog-10; Mon, 16 Nov 2015 13:14:21 GMT ***TO*** Thu, 03 Dec 2015 16:10:13 GMT; 793,736,731 ***TO*** 619,659,262)

NOTE! CHANGED Sid Meier's Alpha Centauri™ Planetary Pack, changelog (http://www.an-ovel.com/downloads/chg/chg_1207658936.htm)
NOTE! ADD +++ Update gog-10 (03 December 2015)
NOTE! ADD +++ We've updated the Mac version of Sid Meier's Alpha Centauri with a fix for a conflict between the Mac printer driver and our version of Wineskin.





NOTE! CHANGED FILE Stronghold HD, downloadables, Mac OS X installer, English (stronghold_hd_en_1.0.0.13.dmg ***TO*** stronghold_hd_2.0.0.4.dmg; ***TO*** gog-4; Mon, 22 Apr 2013 13:39:41 GMT ***TO*** Thu, 03 Dec 2015 16:08:07 GMT; 925,271,272 ***TO*** 923,380,475)

NOTE! CHANGED FILE Stronghold HD, downloadables, Mac OS X installer, French (stronghold_hd_fr_1.0.0.13.dmg ***TO*** stronghold_hd_french_2.0.0.4.dmg; ***TO*** gog-4; Mon, 22 Apr 2013 13:43:15 GMT ***TO*** Thu, 03 Dec 2015 16:08:42 GMT; 920,901,289 ***TO*** 923,187,325)

NOTE! CHANGED FILE Stronghold HD, downloadables, Mac OS X installer, German (stronghold_hd_de_1.0.0.13.dmg ***TO*** stronghold_hd_german_2.0.0.4.dmg; ***TO*** gog-4; Mon, 22 Apr 2013 13:30:54 GMT ***TO*** Thu, 03 Dec 2015 16:08:25 GMT; 925,963,346 ***TO*** 932,596,676)

NOTE! CHANGED FILE Stronghold HD, downloadables, Mac OS X installer, Italian (stronghold_hd_it_1.0.0.13.dmg ***TO*** stronghold_hd_italian_2.0.0.4.dmg; ***TO*** gog-4; Mon, 22 Apr 2013 14:08:19 GMT ***TO*** Thu, 03 Dec 2015 16:08:33 GMT; 916,698,342 ***TO*** 916,975,719)

NOTE! CHANGED FILE Stronghold HD, downloadables, Mac OS X installer, Polish (stronghold_hd_pl_1.0.0.14.dmg ***TO*** stronghold_hd_polish_2.0.0.4.dmg; ***TO*** gog-4; Tue, 23 Apr 2013 16:02:11 GMT ***TO*** Thu, 03 Dec 2015 16:09:10 GMT; 965,799,919 ***TO*** 963,800,188)

NOTE! CHANGED FILE Stronghold HD, downloadables, Mac OS X installer, Spanish (stronghold_hd_es_1.0.0.13.dmg ***TO*** stronghold_hd_spanish_2.0.0.4.dmg; ***TO*** gog-4; Mon, 22 Apr 2013 13:53:49 GMT ***TO*** Thu, 03 Dec 2015 16:09:21 GMT; 1,154,207,641 ***TO*** 1,160,882,069)

NOTE! CHANGED Stronghold HD, changelog (http://www.an-ovel.com/downloads/chg/chg_1207658712.htm)
NOTE! ADD +++ Patch gog-4 (03 December 2015)
NOTE! ADD +++ We've updated the Mac version of Stronghold HD to be compatible with Mac OS X 10.11.
NOTE! ADD +++ This update also includes a fix for a conflict between the Mac printer driver and our version of Wineskin.





NOTE! CHANGED Satellite Reign, file_size: 547 MB ***TO*** 548 MB

[The missing patch title mentioned before was added as "Patch 1.06.02 [Windows]"]





NOTE! CHANGED Crypt of the NecroDancer - Extras [DLC], image: http://images.gog.com/d11b4642cf07819e5d9f3e68fe9bb31e2bc95e778610faa731ac08d82b69a7a0_100.jpg ***TO*** http://images.gog.com/02691684acae8681f05e96f996bb76de3fad42bc45ef4cb2373d0673238e04b5_100.jpg

NOTE! CHANGED Crypt of the Necrodancer - Danny Baranowsky Soundtrack [DLC], image: http://images.gog.com/8fb156d7ffb296da99a9a499d2163997452a2d42a9bcde06e7564be0f107e7a7_100.jpg ***TO*** http://images.gog.com/6ba02eb423d3ac5c045ed06d100a4839249c3e42e47d465905a17fc356ca39e8_100.jpg

NOTE! CHANGED Crypt of the Necrodancer - Extended Soundtrack [DLC], image: http://images.gog.com/99f13d583d7a8cc6f7da480f133769892b4356fc281b1feaa1e97bd7ad0ffd49_100.jpg ***TO*** http://images.gog.com/6a7b8da9e0e5e5735faf51e804f64e9220b29a879f020af93abe670299334811_100.jpg

[More upcoming daily deals, most likely.]

GOG please employ mrkgnao as Webmaster. or whoever MaGog is

mrkgnao is MaGog's servant.

I hear rumors of rituals & pentagrams as well.