Hi everyone!

I would like to compile a list of GOG Free Games just for fun. Previously I used Adamantios GOGmix as a source of reference

Adamantios GOGMix

But I realised it hasn't been updated for awhile. I have some games but I can't quite remember the reason for them being free, if you remember how and why it's free please let me know. Also free games include pre-order promotions as well as free gifts obtained after reaching a certain amount in sales (as in the current 2015 winter promotion sale). Does not include limited giveaways in competitions etc

My GOGMix is here
My GOGMix

GOG Connect Mix is here
GOGConnect Mix

Edit: 14th December 2015
As per RWarehall's point, I have taken the liberty to split up the list into 4 distinct sections. It can be found on the respective posts below

Edit : 2 June 2015
Added in GOGMix for the new GOGConnect

Edited: 7th June 2017
Added in new list for external party promotions
Added in new list for extra keys of same game given with purchase

Edited: 22nd Nov 2017
Added in new GOGConnect List

Edited: 14th February 2018
Added in new list for pre-order DLC freebies

Edited: 25th September 2018
Added in new GOGConnect List. Also GOGMix will not be updated from here on due to non-functionality of GOGMix Update Mechanism. Related Forum Post

Permenently Free Games
Temporary Free Games - Giveaways
Temporary Free Games - Pre-order Game Freebies
Temporary Free Games - Pre-order DLC Freebies
Temporary Free Games - Free with Purchase
Temporary Free Games - GOGConnect Part 1
Temporary Free Games - GOGConnect Part 2
Temporary Free Games - GOGConnect Part 3
Temporary Free Games - GOGConnect Part 4
In conjunction with external parties
Extra keys given

Akalabeth
Ultima 4
Beneath a Steel Sky

all I can remember

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List of Free Games - Permanently Free Games
-------------------------------

AKALABETH : WORLD OF DOOM
Startrail says: Permanently free game since 2 January 2015.

BENEATH A STEEL SKY
Adamantios says: Permanently free game since 20 December 2008 (or before).

BIO MENACE
Startrail says: Permanently free game since 21 December 2015.

FLIGHT OF THE AMAZON QUEEN
Adamantios says: Permanently free game since 20 September 2013 (as part of GOG's continuing 5th anniversary celebration).

LURE OF THE TEMPTRESS
Adamantios says: Permanently free game since 20 December 2008 (or before).

STARGUNNER
Adamantios says: Permanently free game since 13 September 2013 (as part of GOG's 5th anniversary celebration).

TEEN AGENT
Adamantios says: Permanently free game since 22 February 2010 (or before).

TREASURE ADVENTURE GAME
Adamantios says: Permanently free game since 22 March 2012.

TYRIAN 2000
Adamantios says: Permanently free game since 23 December 2010.

ULTIMA™ 4: QUEST OF THE AVATAR
Adamantios says: Permanently free game since 3 September 2011.

WARSOW
Adamantios says: Permanently free game since 18 October 2012.
Startrail says: Game removed on October 31st 2017.

WORLDS OF ULTIMA™ : THE SAVAGE EMPIRE
Adamantios says: Permanently free game since 18 June 2012.

ULTIMA™ WORLDS OF ADVENTURE 2: MARTIAN DREAMS
Adamantios says: Permanently free game since 18 June 2012.

SHADOW WARRIOR: CLASSIC COMPLETE
Startrail says: Made free from 2nd September 2016 as part of Classic Redux Release

CAYNE
Startrail says: Permanently free since 1st February 2017

ESCHALON: BOOK I
Startrail says: Permanently free since 28th February 2017

SANG-FROID: TALES OF WEREWOLVES
Startrail says: Permanently free since 16th May 2017

SUNRIDER: MASK OF ARCADIUS
Startrail says: Permanently free game since 23rd May 2018

JILL OF THE JUNGLE: THE COMPLETE TRILOGY
Startrail says: Permanently free game since 2nd November 2018

Tada!

http://www.gog.com/games##sort=bestselling&price=free&page=1

edit: oh, you mean games that are free now or have been at some point in the past. gotcha

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List of Temporary Free Games - Giveaways
-------------------------------

AGE OF WONDERS
Startrail says : Temporarily free game that was given as part of Winter Promotion 2014 from the 4 December 2014. Only 250,000 copies were given away

ALAN WAKE'S AMERICAN NIGHTMARE
Adamantios says: Temporarily free game that was given out as a free copy on 25 June 2014 (within a 30 minute window) as part of the DRM-Free Summer Sale promo.

ALIENS VERSUS PREDATOR CLASSIC 2000
Adamantios says: Temporarily free game that was given out as a free copy on 15 October to 18 2014 as part of a reward for those who joined as GOG Galaxy beta testers.

BATTLE REALMS + WINTER OF THE WOLRD
Startrail says : Temporarily free game that was given out as part of Summer Sale #DealOverlord from the 9th of June to the 11th of June 2015

BROKEN SWORD: DIRECTOR'S CUT
Adamantios says: Temporarily free game that was given out as a free copy on 29 September 2011 to celebrate GOG's 6 millionth game download milestone.

CARMAGEDDON MAX PACK
Adamantios says: Temporarily free game of which 50,000 free gift codes were given out in a giveaway hosted by GOG on reddit to celebrate the release of Carmageddon 2: Carpocalypse Now to anyone who sent a private message before the end of 19 October 2013.

DUKE NUKEM 3D ATOMIC EDITION
Adamantios says: Temporarily free that was given out as a free copy on 12 December 2012 as part of a winter sale/holiday promo.

DUNGEON KEEPER GOLD™
Adamantios says: Temporarily free game that was given out as a free copy from 15 February to 16 February 2014.

EMPIRE EARTH GOLD EDITION
Adamantios says: Temporarily free game that was given out as a free copy on 12 December 2011 as part of a winter sale/holiday promo.

FALLOUT 1
Startrail says : Classic Version (non-Bethesda version) given out during Winter Sale 2013, partly due to slated for removal on 31 December 2013 as part of ownership change from Interplay to Bethesda.

FALLOUT 2
Startrail says : Classic Version (non-Bethesda version) given out during Winter Sale 2013, partly due to slated for removal on 31 December 2013 as part of ownership change from Interplay to Bethesda.

FALLOUT TACTICS
Startrail says : Classic Version (non-Bethesda version) given out during Winter Sale 2013, partly due to slated for removal on 31 December 2013 as part of ownership change from Interplay to Bethesda.

GIANTS: CITIZEN KABUTO
Startrail says : Given away during the last two days of the Winter Sale 2015

JAGGED ALLIANCE: DEADLY GAMES
Adamantios says: Temporarily free game that was given as a free copy on 19 October 2010 to members registered before GOG moved out of the beta site.

LITTLE BIG ADVENTURE
Startrail says : Temporarily free game that was given out as part of the Vive La France Promotion from the 7-8 November 2014

MAGRUNNER: DARK PULSE
Adamantios says: Temporarily free game that was given out as a free copy from 18 June to 19 June 2014 as part of the DRM-Free Summer Sale promo.

MOUNT & BLADE
Startrail say : Temporarily free game that was given out to celebrate Mount & Blade on GOG Store and also as part of the 2014 Fall sale, from the 12-14 November 2014. Also given out to celebrate the Mount & Blade Grand tournament from the 19th of May 2017 to the 21st of May 2017

OMERTA: CITY OF GANGSTERS (4 DLCS INC...
Adamantios says: Temporarily free game that was given out as a free copy on 24 June 2014 (within a 3-hour window) as part of the DRM-Free Summer Sale promo.

REALMS OF ARKANIA 1+2
Adamantios says: Temporarily free game that was given out to everyone who participated in the 2nd GOG Annual Survey, which ran from 10 September to 17 September 2012. (The first GOG Annual Survey only gave 20 randomly chosen individuals a free game of their choice.)

REALMS OF ARKANIA 3
Adamantios says: Temporarily free game since 20 November 2012, which was randomly won (at a 50:50 chance) when taking part in GOG's download quality test

RISE OF THE TRIAD (2013)
Startrail says : Temporarily free game that was given out as part of Steam Cross-Play Functionality. Only 30,000 copies given from the 13 May 2015

STILL LIFE 2
Adamantios says: Temporarily free game that was given out as a free copy on 24 June 2014 (within a 3-hour window) as part of the DRM-Free Summer Sale promo.

THE DARK EYE: CHAINS OF SATINAV
Grilledfish says : Given away during an AMA on reddit on the 22 January 2014

TORCHLIGHT
Adamantios says: Temporarily free game that was given out as a free copy from 18 June to 20 June 2013 as part of the 2013 NoDRM Summer Sale. Was also free on 24 June 2014 (within a 3-hour window) as part of the DRM-Free Summer Sale promo.
Startrail says: Any other instance? I remembered this game being given free a couple of times

WITCHER 2: ASSASSINS OF KINGS, THE
Startrail says : Temporarily free game that was given out to everyone who collected 7 stamps during the Fall Sale in 2014

WORMS: FORTS UNDER SIEGE
Startrail says : Temporarily free game during Team 17's 25th Anniversary from 14th to 19th December 2015

CONSORTIUM: MASTER EDITION
Startrail says: Temporarily free game given in celebration of the Kickstarter for its sequel Consortium: The Tower from the 12-14 of February 2016

SYSTEM SHOCK 2
Startrai says: Temporarily free game given during 2016 Summer Sale if GOG Galaxy Client installed

LITTLE BIG ADVENTURE 2 (TWINSEN'S ODYSSEY)
Startrail says : Temporarily free game that was given out during 2016 Fall Sale

NEVERWINTER NIGHTS: DIAMOND EDITION
Startrail says : Temporarily free game that was given out during 2016 Winter Sale

CONSTRUCTOR
Startrail says : Temporarily free game that was given out on the 31st of January 2017 to celebrate the eventual release of Constructor HD

SAINTS ROW 2
Startrail says : Temporarily free game that was given out on the 21st of April 2017 to celebrate the final Saints Row release, Saints Row 4

FANTASY GENERAL
Startrail says : Temporarily free game that was given out for 200K followers on Facebook, given on 21st April for 48 Hours using code FB200KGIVEAWAY. Also given away during the 2017 Summer Sale's final 48 hours

EADOR: GENESIS
Startrail says : Temporarily free game that was given out as part of the Old Timers Week, on the 11th of May 2017 for 48 hours

JOTUN: VALHALLA EDITION
Startrail says: Temporarily free given that was given out in conjunction with the pre-order of Sundered from the 14th to 16th of July 2017

DEADLIGHT: DIRECTOR'S CUT
Startrail says: Free from the 14th to 16th of August 2017 as part of the Pinata Madness Sale

ODDWORLD: ABE'S ODDYSEE
Startrail says: Free from the 19th to 21st of September 2017 as part of the Big Deal Sale

STRONGHOLD HD
Startrail says: Free from the 24th to 26th of October 2017 as part of the Polish Games Release

A.D. 2044
Startrail says: Free from the 24th to 26th of October 2017 as part of the Polish Games Release

SYBERIA
Startrail says: Free game that was offered as a free copy from 8th to 11th of November 2017 to celebrate release of Syberia 3.

MDK
Startrail says: Free from the 21st to 23rd of November 2017 as part of Black Friday Sale 2017

GRIM FANDANGO REMASTERED
Startrail says: Free from the 12th to 13th December 2017 as part of Winter Sale 2017

OXENFREE
Startrail says: Free from the 20th to 21st December 2017 as part of Winter Sale 2017

CARMAGEDDON TDR 2000
Startrail says: Free from 18th to 20th January 2018 in conjunction with release of Carmageddon: Max Damage

KING OF FIGHTERS 2002
Startrail says: Free from 13th to 15th February 2018 in conjunction with GOG Lunar New Year Sale 2018 from the 13th to 20th of February 2018

DUNGEONS II
LongitudinalThrust says: Free from 16th Februrary 2018 in conjunction with GOG Lunar New Year Sale 2018 from the 13th to 20th of February 2018

UNREAL GOLD
Startrail says: Free from 22nd to 24th May 2018 in conjunction with Unreal's 20th Anniversary.

XENONAUTS
Startrail says: Free from the 4th to 6th of June 2018 as part of 2018 Summer Sale

ZIGGURAT
Startrail says: Free from the 11th to 13th of June 2018 as part of 2018 Summer Sale

SHADOW WARRIOR 2
Startrail says: Given as part of GOG 10th Anniversary Giveaway from the 4th to 6th of October 2018. Won the vote of GOG Users over Superhot and Firewatch.

DISTRAINT: DELUXE EDITION
Sjuan says: Free for 48 hours.
Startrail says: Free from 23rd to 25th January 2019 as part of the HOT SALE 2019

OBDUCTION
Sjuan says: Free for 48 hours.
Startrail says: Free from 30th May 2019 to 1st June 2019 as part of 2019 Summer Sale

TOONSTRUCK
Startrail says: Free from 14th to 16th June 2019 as part of 2019 Summer Sale

FREESPACE 2
Startrail says: Free from 25th to 27th June 2019 as part of Interstellar Sale 2019

SHERLOCK HOLMES ARTBOOK
Startrail says: Free from 5th October 2019 till unknown as of 17th October 2019, with code SWEETTHANKS to be redeemed on GOG.com

Stargunner
Tyrian 2000
Treasure Adventure Game

are all free as well

GOG gave away The Dark Eye: Chains of Satinav for free when Daedalic did an AMA on reddit Jan 22 2014

https://www.reddit.com/r/IAmA/comments/1vuvzb/iama_developer_of_blackguards_daedalic/

Cool thanks for this!

During the last Insomnia sale, you had the chance to get each of the games in the sale for free (I got Shadowrun Returns, Lumino City, The Vanishing of Ethan Carter and another one I don't remember). Not sure if it makes sense to include thes games in the list though (because it would be many games and just a small part of the customers got them for free).

Hi PaterAlf

Thanks :) But think those are limited and few and far in-between. I'm looking at those that are available for the masses and easily obtainable. But that list will make another good topic! Maybe when I'm done with this one :D

I have everything I want from the current free game list but there are many on the coming soon section I'll love to get.

Voila
Eh, should have read the OP fully :embarassed:

New item added today - CItizens Kabuto Free. Go claim while it's there!

Eador: Genesis was given free with preorders of Eador: Masters of the Broken World.

Thanks for this! WIll add it to the list