How detailed.

It's also possible that it's a version update to allow crossplay, since it does require both versions to be the same.

I'd still go with trolling tbh.
Hush now, it's the changelog trolling us ;)

Pony Island Sunless Sea

From MaGog's logs for 1 April:

NOTE! CHANGED FILE Among the Sleep, downloadables, Windows installer, English+French+German+Italian+Norwegian+Russian+Spanish+Turkish (setup_among_the_sleep_2.2.0.9.exe ***TO*** setup_among_the_sleep_2.3.0.10.exe; 1.3.2 (gog-9) ***TO*** 2.0.0 (gog-10); Wed, 04 Nov 2015 11:57:21 GMT ***TO*** Fri, 01 Apr 2016 10:01:58 GMT; 1,543,737,328 ***TO*** 1,330,584,624)

NOTE! REMOVED FILE Among the Sleep, downloadables, Patch 1.3.2 (patch_among_the_sleep_2.2.0.9.exe; ; Wed, 04 Nov 2015 11:53:38 GMT; 407,908,440)

NOTE! CHANGED Among the Sleep, changelog (http://www.an-ovel.com/downloads/chg/chg_1207664603.htm)
NOTE! ADD +++ Patch 2.0.0 (01 April 2016)
NOTE! ADD +++ Unity 5 conversion:
NOTE! ADD +++ Slight changes to physics behavior
NOTE! ADD +++ Visual changes and minor improvements
NOTE! ADD +++ Tons of bug fixes and tweaks
NOTE! ADD +++
NOTE! ADD +++ Performance:
NOTE! ADD +++ Brand new manual occlusion system
NOTE! ADD +++ General optimization
NOTE! ADD +++
NOTE! ADD +++ Misc:
NOTE! ADD +++ Added commentary track!
NOTE! ADD +++ Bug fixes of audio system
NOTE! ADD +++ Overall tweaks of ambience and soundscapes
NOTE! ADD +++ Minor language tweaks and bug fixes
NOTE! ADD +++ Added Polish subtitles

NOTE! CHANGED Among the Sleep, file_size: 1.5 GB ***TO*** 1.3 GB

[Mac and Linux already updated yesterday]





NOTE! Probably CHANGED FILE DEADBOLT, all_files, Windows installer, English, dl_ver: 1.0.1 (gog-4) ***TO*** 1.0.2 (gog-5)

NOTE! CHANGED DEADBOLT, changelog (http://www.an-ovel.com/downloads/chg/chg_1457453536.htm)
NOTE! ADD +++ Patch 1.0.2 (01 April 2016)
NOTE! ADD +++ Game:
NOTE! ADD +++ Cardinals now cast light on attack
NOTE! ADD +++ "As A Glass" now has a jukebox
NOTE! ADD +++ Added links to new custom map objects:
NOTE! ADD +++ Dock (Structure)
NOTE! ADD +++ Arcade Machine (Cover)
NOTE! ADD +++ Dartboard (Cover)
NOTE! ADD +++ Sink (Vent)
NOTE! ADD +++ Semi-Auto Shotgun (Weapon)
NOTE! ADD +++ Suppressed Shotgun (Weapon)
NOTE! ADD +++ .25 Mousegun (Weapon)
NOTE! ADD +++ Blunderbuss (Weapon)
NOTE! ADD +++ Flashbang (Weapon)
NOTE! ADD +++ Jukebox, with music changer [Misc]
NOTE! ADD +++ Boat (Misc)
NOTE! ADD +++
NOTE! ADD +++ Bug Fixes:
NOTE! ADD +++ Fixed a bug where you could get shot after entering a vent
NOTE! ADD +++ Suppressed Pistol description now properly states that it holds 10 bullets
NOTE! ADD +++ Mission-special weapons can no longer be carried to other missions
NOTE! ADD +++ Lighting is immediately checked on exiting vents
NOTE! ADD +++ Chained custom maps now work

NOTE! CHANGED DEADBOLT, file_size: 296 MB ***TO*** 295 MB





NOTE! Probably CHANGED FILE Hyper Light Drifter, all_files, Windows installer, English, dl_ver: 3/30/2016 (gog-2) ***TO*** 3/31/2016:2 (gog-3)

NOTE! Probably ADDED FILE Hyper Light Drifter, all_files, Patch 3/31/2016:2 (gog-3) [Windows], dl_ver: ***TO*** 3/30/2016 (gog-2) -> 3/31/2016:2 (gog-3)

NOTE! CHANGED Hyper Light Drifter, changelog (http://www.an-ovel.com/downloads/chg/chg_1452863689.htm)
NOTE! ADD +++ Patch 3/31/2016:2 (01.04.2016)
NOTE! ADD +++ improvements to controller support & other bug fixes





NOTE! Probably CHANGED FILE Obscuritas, all_files, Windows installer, English (part 1/2/3 of 3), dl_ver: 1.0 (gog-2) ***TO*** 1.1 (gog-3)

[No changelog]





NOTE! CHANGED FILE Republique, downloadables, DLC: Deluxe Edition Upgrade: soundtrack (FLAC) (republique_ost_flac.zip ***TO*** republique_ost_complete_flac.zip; Tue, 22 Mar 2016 17:57:51 GMT ***TO*** Fri, 01 Apr 2016 12:20:01 GMT; 907,561,498 ***TO*** 1,258,153,548)

NOTE! CHANGED FILE Republique, downloadables, DLC: Deluxe Edition Upgrade: soundtrack (MP3) (republique_ost_mp3.zip ***TO*** republique_ost_complete_mp3.zip; Tue, 22 Mar 2016 17:57:13 GMT ***TO*** Fri, 01 Apr 2016 12:25:10 GMT; 599,124,128 ***TO*** 790,398,102)

NOTE! CHANGED Republique, changelog (http://www.an-ovel.com/downloads/chg/chg_1423080728.htm)
NOTE! ADD +++ Update (01 April 2016)
NOTE! ADD +++ The Deluxe Edition soundtrack for Republique now includes the soundtracks for all 5 episodes.





NOTE! CHANGED FILE Sunless Sea, downloadables, Linux installer, English (gog_sunless_sea_2.0.0.3.sh ***TO*** gog_sunless_sea_2.1.0.4.sh; 1.0.4.2130 (gog-3) ***TO*** 1.0.4.2130 (gog-4); Thu, 25 Feb 2016 11:55:15 GMT ***TO*** Fri, 01 Apr 2016 09:11:15 GMT; 304,231,394 ***TO*** 304,309,139)

NOTE! CHANGED Sunless Sea, changelog (http://www.an-ovel.com/downloads/chg/chg_1421064427.htm)
NOTE! ADD +++ Update (01 April 2016)
NOTE! ADD +++ We've updated the Linux version of Sunless Sea.
NOTE! ADD +++ This update provides some minor fixes and tweaks.





NOTE! CHANGED Baldur's Gate: Siege of Dragonspear - Digital Deluxe Edition [Premium] [Upcoming] [DLC], bonuses: ***TO*** Baldur's Gate: Siege of Dragonspear soundtrack (FLAC and MP3), Baldur's Gate: Enchanced Edition soundtrack (FLAC and MP3)





NOTE! CHANGED In Cold Blood, languages: Audio and text: English. Text only: German ***TO*** Audio and text: German, English

Just as long as we don't get bug. My anti-virus lit up like a christmas tree for this..

Anyone else got some sort of update for Witcher 3? Nothing downloaded yesterday and today suddenly a 2 GB download appeared out of nowhere

Probably the Roach DLC.

What?!

From MaGog's logs for 1 April:

NOTE! Probably ADDED FILE Ashes of the Singularity, all_files, manual

NOTE! CHANGED Ashes of the Singularity, bonuses: ***TO*** manual

[No changelog]





NOTE! CHANGED FILE Baldur's Gate: Enhanced Edition, downloadables, Windows installer, English+French+German+Polish+Spanish (part 1 of 3) (setup_baldurs_gate_enhanced_edition_2.0.0.2.exe ***TO*** setup_baldurs_gate_enhanced_edition_2.1.0.3.exe; ***TO*** 2.0.62.2; Tue, 04 Nov 2014 15:19:06 GMT ***TO*** Fri, 01 Apr 2016 10:50:01 GMT; 881,104 ***TO*** 1,011,976)

NOTE! CHANGED FILE Baldur's Gate: Enhanced Edition, downloadables, Windows installer, English+French+German+Polish+Spanish (part 2 of 3) (setup_baldurs_gate_enhanced_edition_2.0.0.2-1.bin ***TO*** setup_baldurs_gate_enhanced_edition_2.1.0.3-1.bin; ***TO*** 2.0.62.2; Tue, 04 Nov 2014 15:29:01 GMT ***TO*** Fri, 01 Apr 2016 10:58:59 GMT; 1,565,126,528 ***TO*** 2,098,994,944)

NOTE! CHANGED FILE Baldur's Gate: Enhanced Edition, downloadables, Windows installer, English+French+German+Polish+Spanish (part 3 of 3) (setup_baldurs_gate_enhanced_edition_2.0.0.2-2.bin ***TO*** setup_baldurs_gate_enhanced_edition_2.1.0.3-2.bin; ***TO*** 2.0.62.2; Tue, 04 Nov 2014 15:22:15 GMT ***TO*** Fri, 01 Apr 2016 10:53:03 GMT; 506,213,331 ***TO*** 460,144,234)

NOTE! REMOVED FILE Baldur's Gate: Enhanced Edition, downloadables, Mac OS X installer, English+French+German+Polish+Spanish (baldur_s_gate_enhanced_edition_2.0.0.5.dmg; ; Thu, 16 Oct 2014 13:03:32 GMT; 2,177,236,583)

NOTE! ADDED FILE Baldur's Gate: Enhanced Edition, downloadables, Mac OS X installer, English (baldurs_gate_enhanced_edition_2.1.0.11.dmg; 2.0.62.2; Fri, 01 Apr 2016 11:00:21 GMT; 2,686,213,199)

NOTE! CHANGED FILE Baldur's Gate: Enhanced Edition, downloadables, Linux installer, English+French+German+Polish+Spanish (gog_baldur_s_gate_enhanced_edition_2.0.0.3.sh ***TO*** gog_baldur_s_gate_enhanced_edition_2.1.0.4.sh; ***TO*** 2.0.62.2; Wed, 02 Sep 2015 13:26:47 GMT ***TO*** Fri, 01 Apr 2016 11:00:04 GMT; 2,175,776,008 ***TO*** 2,681,986,444)

NOTE! CHANGED Baldur's Gate: Enhanced Edition, changelog (http://www.an-ovel.com/downloads/chg/chg_1207666353.htm)
NOTE! ADD +++ Patch 2.0.62.2 (1 March 2016)
NOTE! ADD +++ The full, official release notes for the v2.0 update are attached at the bottom of this post. It details all of the changes to BG:EE, BGII:EE, and the Infinity Engine as a whole. It also includes a section that's just for modders talking about some of the new opcodes, triggers, and actions that the update adds, as well as a collection of guides to help UI enthusiasts get their feet wet tinkering with the new UI system. The document clocks in at just over 30 pages; you won't want to miss it.
NOTE! ADD +++
NOTE! ADD +++ Compatibility with Baldur's Gate: Siege of Dragonspear expansion added.
NOTE! ADD +++ New Class: The Shaman
NOTE! ADD +++ New Cleric Kit: The Priest of Tyr
NOTE! ADD +++ Class Ability Tweak: Poison Weapon now scales with levels
NOTE! ADD +++ Item Tweak: Stupefier +1 has been adjusted to be more in line with the game's other equipment
NOTE! ADD +++ Spell Tweak: Enchanted Weapon now modifies the target's existing weapons
NOTE! ADD +++ Items can now be placed in the Off-Hand slot while ranged and two-handed weapons are equipped
NOTE! ADD +++ The User Interface has been overhauled with a new system
NOTE! ADD +++ Dozens of modder-friendly enhancements
NOTE! ADD +++ Hundreds of bug fixes
NOTE! ADD +++
NOTE! ADD +++ This is our biggest update ever, and it applies to both Baldur's Gate: Enhanced Edition and Baldur's Gate II: Enhanced Edition. We have a lot of improvements planned in the coming weeks and months as well; stay tuned for more information!
NOTE! ADD +++ Detailed patch notes are available here:
NOTE! ADD +++ http://items.gog.com/releasenotes_2_0.pdf
NOTE! ADD +++ Baldur's Gate II: Enhanced Edition Patch 2.0 will be available on GOG soon.

NOTE! CHANGED Baldur's Gate: Enhanced Edition, file_size: 1.9 GB ***TO*** 2.5 GB

[The links for the Mac French+German+Polish+Spanish installers all yield 404.]





NOTE! Probably CHANGED FILE Divinity: Original Sin - Enhanced Edition, all_files, Windows installer, English (part 1/2/3/4 of 4), dl_ver: 2.0.113.775 (gog-11) ***TO*** 2.0.119.430 (gog-12)

NOTE! Probably ADDED FILE Divinity: Original Sin - Enhanced Edition, all_files, Patch 2.0.119.430 [Windows], dl_ver: ***TO*** 2.0.113.775 -> 2.0.119.430 (gog10+) -> (gog-12)

NOTE! Probably CHANGED FILE Divinity: Original Sin - Enhanced Edition, all_files, Mac OS X installer, English, dl_ver: 2.0.113.775 (gog-7) ***TO*** 2.0.119.430 (gog-8)

NOTE! Probably CHANGED FILE Divinity: Original Sin - Enhanced Edition, all_files, Linux installer, English, dl_ver: 2.0.113.775 (gog-3) ***TO*** 2.0.119.430 (gog-4)

NOTE! Probably ADDED FILE Divinity: Original Sin - Enhanced Edition, all_files, Patch 2.0.119.430 [Linux], dl_ver: ***TO*** gog-3 -> gog-4

NOTE! CHANGED Divinity: Original Sin - Enhanced Edition, changelog (http://www.an-ovel.com/downloads/chg/chg_1445516929.htm)
NOTE! ADD +++ Patch 2.0.119.430 (01st April 2016)





NOTE! Probably CHANGED FILE Kona [In Dev], all_files, Windows installer, English (part 1/2 of 2), dl_ver: 20160324-1 (gog-11) ***TO*** 20160331-01 (gog-12) (same for all other languages)

NOTE! Probably ADDED FILE Kona [In Dev], all_files, Patch 20160331-01 (gog-12) [Windows], dl_ver: ***TO*** 20160324-1 (gog-11) -> 20160331-01 (gog-12)

NOTE! Probably CHANGED FILE Kona [In Dev], all_files, Mac OS X installer, English, dl_ver: 20160324-1 (gog-1) ***TO*** 20160331-01 (gog-2) (same for all other languages)

NOTE! Probably CHANGED FILE Kona [In Dev], all_files, Linux installer, English, dl_ver: 20160324-1 (gog-1) ***TO*** 20160331-01 (gog-2) (same for all other languages)

NOTE! Probably ADDED FILE Kona [In Dev], all_files, Patch 20160331-01 (gog-2) [Linux], dl_ver: ***TO*** 20160331-01 (gog-2)

NOTE! CHANGED Kona [In Dev], changelog (http://www.an-ovel.com/downloads/chg/chg_1454319762.htm)
NOTE! ADD +++ Patch 20160331-01
NOTE! ADD +++ Adds original French voice overs

NOTE! CHANGED Kona [In Dev], file_size: 1.9 GB ***TO*** 1.8 GB





NOTE! Probably CHANGED FILE Pony Island, all_files, Windows installer, English, dl_ver: 1.17 (gog-2) ***TO*** 1.18 (gog-3)

NOTE! Probably CHANGED FILE Pony Island, all_files, Mac OS X installer, English, dl_ver: 1.17 (gog-2) ***TO*** 1.18 (gog-3)

NOTE! Probably CHANGED FILE Pony Island, all_files, Linux installer, English, dl_ver: 1.17 (gog-3) ***TO*** 1.18 (gog-4)

NOTE! CHANGED Pony Island, changelog (http://www.an-ovel.com/downloads/chg/chg_1454596244.htm)
NOTE! ADD +++ Patch 1.18 (01 April 2016)
NOTE! ADD +++ Typos fixed and some fixes for non-English languages.

NOTE! CHANGED Pony Island, file_size: 112 MB ***TO*** 114 MB





NOTE! CHANGED Sea Dogs: Caribbean Tales, languages: Audio and text: English, Russian ***TO*** Audio and text: German, English, Spanish, French, Italian, Russian

Note that "Ashes of the Singularity" just got a manual.

1 March 2016. Is that the joke today? :P Also no update flag....

Thanks for letting me know! I wonder if its going to be like the quickstart guide I had found or better, but anyways, removed it from my gogmix...

I also got an update flag for Obscuritas yesterday, but no changelog.

It's reported here, in case you want to know the affected files (not much information, considering the game has no files other than the windows installer anyhow).