New all-time high discounts from the "Plug In Digital / Dear Villagers" publisher sale,
valid until December 19th:

Astria Ascending --- 3.58€ (90% off, was 85% before) # Thx @Cavalary
Astria Ascending - OST (dlc) --- 2.49€ (65% off, was 60% before)
Astria Ascending - Cosmetic Weapon Set (dlc) --- 1.39€ (55% off, was 50% before)

Shattered - Tale of the Forgotten King --- 2.49€ (90% off, was 85% before)
AWAY: Journey to the Unexpected --- 1.69€ (90% off, was 85% before)
Ashwalkers --- 1.19€ (90% off, was 85% before)
Ethan: Meteor Hunter --- 0.98€ (90% off, was 85% before)

Before I Forget --- 1.69€ (75% off, was 40/75% before**) # repeat (1st), rarely on sale
Saviorless --- 5.19€ (60% off, was 50% before)
SeaOrama: World of Shipping --- 9.99€ (50% off, was 30% before)

# DLCs only:
ScourgeBringer - OST (dlc) --- 1.79€ (75% off, was 70% before)
ScourgeBringer Supporter Pack (dlc) --- 1.39€ (65% off, was 60/65% before**) # repeat (1st)
Golazo! 2: Qatar International Stars (dlc) --- 0.29€ (63/70% off, was 63/67% before) # new best, but only in US$
Golazo! 2: Pixel Stars (dlc) --- 0.39€ (61/70% off, was 20% before)

 
 
 
 
Updates / other ATH discounts,
valid until December 11th / 12th:

Phantasie Memorial Set --- 4.89€ (50% off, was 40% before)

Creatura is 90% off

Has been 85% before I think. Unfortunately it lacks the Linux version on GOG.

Much appreciated! :) I've added this deal to the overview list.

New all-time high discounts from the "Retrovibe" publisher sale,
valid until December 19th:

Project Warlock --- 1.69€ (85% off, was 80% before)
B.I.O.T.A. --- 4.09€ (55% off, was 50% before)
Impaler Gold (pack) --- 2.79€ (45% off, was 35% before) # best since May '24 base price increase
Project Warlock II --- 9.59€ (40% off, was 35/40% before) # repeat (1st, Nov.'23), still a new best price by a few cents
Shardpunk --- 8.29€ (40% off, was 33% before)
Shardpunk - Deluxe Edition (pack) --- 10.29€ (35% off, was 15% before)
Shardpunk - Digital Compendium (dlc) --- 2.29€ (25% off, was 15% before)
Shardpunk - Official Soundtrack (dlc) --- 2.29€ (25% off, was 15% before)

 
 
 
 
From the "Slitherine" publisher Sale:

-- nothing new --

 
 
 
 
CD Projekt Red,
valid until January 3rd:

** UPDATED

# After a longer, more expensive period, The Witcher 3 returns to its best price of March 2023 and before
The Witcher 3: Wild Hunt - Complete Edition (pack) --- 10.00€ (80% off, was 70/75/80% before)
The Witcher 3: Wild Hunt - Expansion Pass (dlc) --- 7.49€ (70% off, was 60/65/70% before)
The Witcher 3: Wild Hunt - Hearts of Stone (dlc) --- 2.99€ (70% off, was 60/65/70% before)
** The Witcher 3: Wild Hunt - Blood and Wine (dlc) --- 5.99€ (70% off, was 65/70% before)

** Cyberpunk 2077: Ultimate Edition (pack) --- 46.39€ (42% off, was 40% before) #Thx @IXOXI
GWENT: Rogue Mage --- 3.58€ (65% off, was 60% before)

 
 
 
 
Other:
Deck of Souls --- 9.49€ (20% off, was 10% before) # but at the same time a slightly increased base price (+9%),
valid until December 17th

A few new ones from the Winter Sale (listing base prices):

Ancestors: The Humankind Odyssey - $7.99
Heads Will Roll: Reforged - Happily Ever After (DLC) - $2.69
Sudoku Zenkai / 数独全卡 - $2.79

A few more all-time high discounts from the Winter Sale:

- Battle Engine Aquila (44% off, was 34% previously)

- Blazing Chrome (75%, prev. 70%)

- Ballance (44%, prev. 40%)

- Lollypop (44%, prev. 33%)

- Nitro Racers (44%, prev. 35%)

- Sabre Team (44%, prev. 35%)

I believe Vaporum and Magical Drop Vi are all time low

Gord - Ultimate Edition is 90% off which looks like a price bug.
It's cheaper than Standard and Deluxe editions.

It happens!

Syberia: The World Before - Digital Deluxe Edition Is currently cheaper than the base game.

All time high discounts I found so far (Winter Sale, until 03/01/2025 09:59 EET):

Microids
Syberia: The World Before - Digital Deluxe Edition : Now -85%, Previous highest was -80%
The Syberia Collection : Now -90%, Previous highest was -85%
The Smurfs - Mission Vileaf: Now -90%, Previous highest was -85%
Agatha Christie - Hercule Poirot: The First Cases: Now -90%, Previous highest was -85%
Agatha Christie - Hercule Poirot: The London Case: Now -80%, Previous highest was -70%
Agatha Christie - Murder on the Orient Express: Now -75%, Previous highest was -60%

Ziggurat
(trying not to repeat)
Advent Rising: Now -70%, Previous highest was -65%
Corridor 7: Alien Invasion Now -50%, Highest ever discount after the Oct 2021 giveaway (Still cheaper to buy Retro Shooter Rampage Bundle)
Killing Time (Classic): Now -60%, Previous highest was -50% (Still cheaper to buy Retro Shooter Rampage Bundle)
Last Rites: Now -75%, previous highest was -70% (Still cheaper to buy Retro Shooter Rampage Bundle)
Line of Sight: Vietnam: Now -75%, previous highest was -65%.
The Dame Was Loaded: Now -70%, previous highest was -60%.
TNT War Bundle: Now -30%. Previous highest was -20% (Warning: currently costs more than the sum of the parts)
NAM: Now -75%. Previous highest was -65%. (Cheaper than TNT War Bundle)
World War II GI: Now -75%. Previous highest was -65%. (Cheaper than TNT War Bundle)
XF5700 Mantis Experimental Fighter: Now -50%, repeats same high that happened in Oct 2021.

Abbey Games
Reus: Now -75%, Repeats all time high that happened in June 2022.
Renowned Explorers: Definitive Edition: Now -70%, previous highest was -60%.

Meh, the forum keeps breaking my URLs, sorry.

Got Gord, and looking at https://www.gog.com/game/everspace -95%

<< Link back to matterbandit's overview list of current all-time high discounts and best prices
___

New all-time high discounts from the "Winter Sale" promo,
valid till January 2nd / 3rd:

PART 1
# Since this is a larger, seasonal sale, I'll split my findings into multiple parts again. :)

** UPDATED

EVERSPACE --- 0.99€ (95% off, was 90% before) #Thx @solseb
Caveblazers --- 0.49€ (95% off, was 90% before)
Arkanoid - Eternal Battle --- 0.89€ (91% off, was 90% before)
Dishonored 2 --- 3.00€ (90% off, was 80/90% before) # 1st repeat / Dec.'23
Sniper Ghost Warrior 3 Gold Edition (pack) --- 2.49€ (90% off, was 85% before)
Sniper Ghost Warrior Contracts --- 3.00€ (90% off, was 84% before)
Gord - Ultimate Edition (pack) --- 5.00€ (90% off, was 75% before) # Thx @ciemnogrodzianin
Gord --- 7.00€ (80% off, was 75% before) # buy the cheaper Ultimate edition instead
Gord - Deluxe Edition (pack) --- 8.00€ (80% off, was 75% before) # buy the cheaper Ultimate edition instead

Wavetale --- 3.00€ (90% off, was 80% before)
Magical Drop VI --- 3.00€ (90% off, was 75% before) # Thx @alexandros050
Ira --- 1.99€ (90% off, was 50% before)
Eldest Souls --- 1.99€ (90% off, was 80% before)
Tails of Iron --- 2.49€ (90% off, was 88% before)
** Tails of Iron - Complete Edition (pack) --- 8.99€ (70% off, was 50% before)
** Tails of Iron Barbarian Ratsody (pack) --- 8.29€ (70% off, was 50% before)
RemiLore: Lost Girl in the Lands of Lore --- 3.39€ (90% off, was 40/50/90% before) # 1st repeat / Dec.'23
White Shadows --- 1.99€ (90% off, was 85% before)
The Smurfs - Mission Vileaf --- 1.99€ (90% off, was 85% before) # Thx @thiagott
The Lightbringer --- 1.49€ (90% off, was 75% before)
NecroLand: Undead Corps --- 0.99€ (90% off, was 50/80% before)

Togges --- 1.99€ (90% off, was 85% before)
R&ouml;ki (Röki) --- 2.19€ (90% off, was 80% before)
HyperParasite --- 1.49€ (90% off, was 60/80% before)
Sparklite --- 2.49€ (90% off, was 85% before)
Sparklite Deluxe Edition (pack) --- 3.00€ (90% off, was 80% before)
Offworld Trading Company (pack) --- 3.00€ (90% off, was 75% before)
Swordship --- 1.99€ (90% off, was 85% before)
Vaporum --- 1.99€ (90% off, was 85% before) # Thx @alexandros050

Paper Cut Mansion --- 1.99€ (90% off, was 85% before)
Prison Architect --- 2.49€ (90% off, was 80% before)
Europa Universalis IV --- 5.00€ (90% off, was 87% before)
Sphere - Flying Cities --- 1.85€ (90% off, was 80% before)
Sphere - Flying Cities - Save the World Edition (pack) --- 2.79€ (90% off, was 80% before)
Crystal Crisis --- 1.69€ (90% off, was 80% before)
The Agatha Christie Collection (pack) --- 3.00€ (90% off, was 85% before)
New Joe &amp; Mac - Caveman Ninja --- 3.29€ (90% off, was 85% before)
Asterix &amp; Obelix: Slap them All! --- 2.79€ (90% off, was 85% before)

Nox Archaist --- 1.69€ (90% off, was 80% before)
Nox Archaist Ultimate Bundle (pack) --- 3.99€ (90% off, was 80% before)
Nox Archaist Soundtrack (dlc) --- 0.39€ (90% off, was 80% before)
Nox Archaist DLC Bundle (dlc) --- 2.39€ (90% off, was 80% before)
Nox Archaist Game Bundle (pack) --- 2.29€ (90% off, was 80% before)
Nox Archaist: Lord of Storms (dlc) --- 0.79€ (90% off, was 80% before)
The Making of Nox Archaist (dlc) --- 0.89€ (90% off, was 79% before)
Nox Archaist Book of Hints (dlc) --- 0.89€ (90% off, was 79% before)

New all-time high discounts from the "Winter Sale" promo,
valid till January 2nd / 3rd:

PART 2

** UPDATED

Kerbal Space Program --- 4.79€ (88% off, was 75% before)
Ghost of a Tale --- 3.49€ (85% off, was 75% before)
Syberia: The World Before - Digital Deluxe Edition (pack) --- 7.49€ (85% off, was 80% before) #Thx @thiagott
Samorost 2 --- 0.79€ (85% off, was 80/85% before) # repeat (Sept.'23)
Samorost 3 --- 2.99€ (85% off, was 80/85% before) # repeat, same
Samorost 3 Cosmic Edition (pack) --- 3.49€ (85% off, was 80/85% before) # repeat, same
Samorost 3 Soundtrack + Art Book (dlc) --- 1.09€ (85% off, was 80/85% before) # repeat, same
Machinarium Collector's Edition --- 2.99€ (85% off, was 80/85% before) # repeat, same
Elite Warriors Vietnam --- 1.49€ (85% off, was 75% before)
SOS OPS! --- 0.89€ (85% off, and 40% reduced base price)
Bad Mojo Redux --- 0.89€ (85% off, was 80% before)
Last Hope Bunker: Zombie Survival --- 0.49€ (85% off, and ~ 55% reduced base price)
ELDERBORN Metal AF Edition (pack) --- 2.79€ (83% off, was 80% before)
ELDERBORN --- 2.39€ (81% off, was 80% before)

Turok --- 3.69€ (80% off, was 75% before)
Cave Story+ --- 2.99€ (80% off, was 75% before)
Blasphemous Digital Deluxe Edition (pack) --- 6.89€ (80% off, was 75% before)
Spectacular Sparky --- 2.49€ (80% off, was 50/80% before) # 1st repeat / Dec.'23
Cognition: Game of the Year Edition (pack) --- 2.79€ (80% off, was 75% before)
One Night Stand --- 0.59€ (80% off, was 70% before)
The Gunk --- 5.00€ (80% off, was 76% before)
Wanna Survive --- 2.49€ (80% off, was 67% before)
Chasm --- 3.39€ (80% off, was 75% before)
Operation Wolf Returns: First Mission --- 5.00€ (80% off, was 75% before)
Asterix &amp; Obelix XXXL: The Ram From Hibernia --- 8.00€ (80% off, was 75% before)

Creaks --- 3.99€ (80% off, was 75% before)
Creaks Collector's Edition (pack) --- 4.59€ (80% off, was 75% before)
Creaks Soundtrack + Art Book (dlc) --- 1.39€ (80% off, was 75% before)
Pilgrims --- 1.39€ (80% off, was 75/80% before) # repeat (Sept.'23)
Regalia - Royal Edition --- 4.59€ (80% off, was 77/80% before) # repeat (Aug.'21)
Renowned Explorers: International Society --- 3.99€ (80% off, was 75% before)
Renowned Explorers: More To Explore (dlc) --- 1.89€ (75% off, was 60% before)
** Renowned Explorers: Definitive Edition (pack) --- 9.00€ (70% off, was 60% before) #Thx @thiagott
** Renowned Explorers: The Emperor's Challenge (dlc) --- 2.49€ (67% off, was 60% before)
The Lord of the Rings: Gollum --- 10.00€ (80% off, was 70% before)
** The Lord of The Rings: Gollum - Precious Edition (pack) --- 18.02€ (70% off, was 67% before)
Ancestors: The Humankind Odyssey --- 8.00€ (80% off, was 75% before) #Thx @Cavalary
** Ancestors: The Humankind Odyssey Official Soundtrack Bundle (pack) --- 11.69€ (75% off, was 68% before)
Supreme League of Patriots: Season Pass (pack) --- 2.99€ (80% off, was 75% before)
SiN Gold --- 1.69€ (80% off, was 75% before)
Surgeon Simulator (pack) --- 1.89€ (80% off, was 0/75% before) # last time on sale in March '21 !
Scrapnaut --- 2.39€ (80% off, was 75% before)

# DLCs only
The Long Reach - Soundtrack (dlc) --- 0.49€ (90% off, was 80% before)
Born Punk - The Art Of Born Punk (dlc) --- 0.79€ (80% off, was 70% before)
Born Punk - The Soundtrack (dlc) --- 0.99€ (80% off, was 70% before)

I love these posts!

At the moment it's simply the best way to search GOG sales and, believe me, I've tried many apporaches and I'm a heavy user of ggdeals, isthereanydeal and I also maintained my own tools :D This is simply the most dense source of information :)

THANK YOU!

New all-time high discounts from the "Winter Sale" promo,
valid till January 2nd / 3rd:

PART 3

** UPDATED

Turok 2: Seeds of Evil --- 4.59€ (75% off, was 70% before)
Ocean's Heart --- 3.79€ (75% off, was 70% before)
The Pedestrian --- 4.19€ (75% off, was 70% before)
Chernobylite --- 7.49€ (75% off, was 67% before)
Vaporum: Lockdown --- 4.50€ (75% off, was 66% before)
Beyond The Edge Of Owlsgard --- 6.19€ (75% off, was 70% before)
Beyond the Edge of Owlsgard Deluxe Edition (pack) --- 6.69€ (75% off, was 70% before)
Blazing Chrome --- 4.29€ (75% off, was 70% before) #Thx @cosevecchie
Godhood --- 6.29€ (75% off, was 70% before)
Godhood - Deluxe Edition (pack) --- 11.99€ (60% off, was 50% before)
** Godhood - Art Book (dlc) --- 3.79€ (25% off, was 20/25% before)

King's Table - The Legend of Ragnarok --- 0.99€ (75% off, was 65% before)
COOP Frenzy: Spirit of the Island + Biped Bundle (pack) --- 8.49€ (75% off, was 70% before)
Decision: Red Daze --- 4.99€ (75% off, was 70% before)
Happy Game --- 3.29€ (75% off, was 70% before)
Happy Game - Collector's Edition (pack) --- 3.99€ (75% off, was 70% before)
Happy Game - Soundtrack + Art Book (dlc) --- 1.79€ (75% off, was 70% before)
Mission Critical --- 1.49€ (75% off, was 65% before)
Daemonsgate --- 1.79€ (75% off, was 70% before)
Downwell --- 0.79€ (75% off, was 67/80% before) # not the absolute best, was -80% once and briefly in March '22
Witchaven --- 1.69€ (75% off, was 66% before)
Witchaven II: Blood Vengeance --- 1.69€ (75% off, was 66% before)
Witchaven I &amp; II Bundle (pack) --- 2.09€ (75% off, was 66% before)

UnderRail --- 4.09€ (70% off, was 65% before)
UnderRail: Expedition (dlc) --- 4.99€ (50% off, was 40% before)
Citizen Sleeper --- 5.09€ (70% off, was 60% before)
Slave Zero --- 2.09€ (70% off, was 65% before)
FLAKE The Legend of Snowblind --- 3.89€ (70% off, was 65% before)
The Smurfs 2 - The Prisoner of the Green Stone --- 9.00€ (70% off, was 60% before)
Inspector Gadget - MAD Time Party --- 9.00€ (70% off, was 60% before)
The Whispering Valley --- 3.59€ (70% off, was 65% before)
1428: Shadows over Silesia --- 5.99€ (70% off, was 66% before)
1428: Shadows over Silesia - Deluxe Edition (pack) --- 7.69€ (67% off, was 60% before)

Greedventory --- 5.89€ (70% off, was 60% before)
Breakout Recharged --- 2.69€ (70% off, was 65% before)
Centipede: Recharged --- 3.19€ (65% off, was 60% before)
Sniper Ghost Warrior Contracts 2 Complete Edition (pack) --- 17.69€ (70% off, was 67% before)
Wildfire --- 4.50€ (70% off, was 60% before)
Kona II: Brume --- 9.00€ (70% off, was 67% before)
Flynn: Son of Crimson --- 5.99€ (70% off, was 60% before)
SUPERHOT ONE OF US BUNDLE (pack) --- 12.29€ (70% off, was 60% before)

# DLCs only:
Not For Broadcast: The Timeloop (dlc) --- 2.09€ (75% off, was 20% before)
Streets Of Rage 4 - Mr. X Nightmare (dlc) --- 3.59€ (55% off, was 50/55% before) # 1st repeat (March '24)