I didn't see a good central location of gog codes from bundles, and more importantly their expiration dates. So here is my attempt to start / compile one. If you have any that I don't have in my list, post it here and I will try to keep this up to date.

UPDATE: You can convert the 8 digit codes to 20 digit codes that never expire if you don't own the game already. Simply redeem code, and on the "checkout" page make sure to mark as a gift. See here for details

Groupees: Topware Interactive Bundle
Earth 2140 - ???? ASSUMED EXPIRED
Earth 2150 - ???? ASSUMED EXPIRED
Earth 2160 - ???? ASSUMED EXPIRED
Jagged Alliance 2 - Wildfire - ???? ASSUMED EXPIRED
Knights & Merchants - ???? ASSUMED EXPIRED

Groupees: 1c Bundle
King's Bounty: Platinum Edition - ???? ASSUMED EXPIRED

Groupees: Bundle of the Dead
Zafehouse Diaries - May 16, 2014 EXPIRED

Groupees: Build a Meridian 4 Bundle
Shadowgrounds - ???? ASSUMED EXPIRED

Groupees: Build a Microids Adventure Bundle
Amerzone - The Explorer Legacy - Apr 23 2015
Atlantis - The Lost Tales - Apr 23 2015
Corsairs Gold - Apr 23 2015

Groupees: Build a Microids Adventure Bundle 2
ATLANTIS 2: BEYOND ATLANTIS - Dec 2, 2015 *Extended*
ATLANTIS 3: THE NEW WORLD - Dec 2, 2015 *Extended*
DRAGON LORE: THE LEGEND BEGINS - Dec 2, 2014 EXPIRED

Groupees: Build a BeMine Bundle
Bloodrayne - Jul 13, 2015

Groupees: Remute's Retro Rampage
MegaRace 1+2 - Nov 11, 2014 EXPIRED

Groupees: Be Mine 14
Bloodrayne 2 - Jul 13, 2015

Groupees: Sherlock Holmes
Journey to the Center of the Earth - July 2, 2013 EXPIRED
Sherlock Holmes: The Silver Earring - July 2, 2013 EXPIRED

Groupees: Be Mine 6
Earth 2160 - ???? EXPIRED

Groupees: Be Mine 15
Lionheart: Legacy of the Crusader - Oct. 21, 2015

Groupees: Retro 4
Earthworm Jim 1+2: The Whole Can O' Worms - FEB 9, 2016

The Humble Weekly Sale: Celebrating Open Source
Defender's Quest - ?????

Humble Weekly Bundle: Strategy
Eador: Masters of the Broken World - ?????

Humble Weekly Bundle: Leading Ladies
Defender's Quest - Oct 28, 2014 ? [Possibly Dec 29th 2014] EXPIRED

Indie Gala Halloween Mix
Realms of The Haunting - Oct 29 2014 EXPIRED

Indie Gala Capsule Computers
Dracula 4 + 5 - Feb 14, 2015

IndieGameStand
Ring Runner: Flight of the Sages - Oct 11 2014 EXPIRED
The Real Texas - June 27, 2014 EXPIRED
The Cat Lady - June 19th 2014 EXPIRED
99 Levels to Hell - Dec 1, 2013 EXPIRED
Pid - ???? EXPIRED
Waking Mars - ????? EXPIRED
Unmechanical - EXPIRED

Other Giveaways
Carmageddon Max Pack - Oct.14,2014 EXPIRED
Dark Eye: Chains of Satinav, The - Jan. 20, 2015 EXPIRED
Realms of Arkania - Oct. 30, 2014 EXPIRED
Aliens vs Predator Classic 2000 - Oct 7, 2015 (gog Galaxy Test)
The Witcher 2: Assassins of Kings - Dec 31, 2014 (GOG - 2014 DRM-Free Big Fall Sale - Stamp Collecting) EXPIRED

Hopefully this helps someone, I know I had some expire on me :(

These are based on my timezone of US Central time. They may be based on timezone (see DyNaer's post below) so it may be slightly different for you, but these should be good guidelines.

Groupees : Be Mine 14

Bloodrayne 2 - Jul 14, 2015

Just checked mine and its the 13th. Hmmmm I wonder if its a timezone thing?

Thanks though for checking.

many thanks, this is a good idea. unfortunately gog has less servers than Valve, and they seem to creek under the weight of all those keys!

edit: mine says the the 14th as well. maybe it is a certain number of days from when you got it.

The giftcodes they give for giveaways do. Like I have a Realm of Arkania from somewhere that expires the end of October. Basically if its one of the short (8 digit) codes, they will expire. The 16 (now 20) ones however do not.

i guess it's due to different timestamps (date should be 13-14 july in this case)

in the past i noticed for game installers some difference in the timestamp if an installer is downloaded from the US or from France (where i live) for example (multiple servers most likely)

that doesn't affect the hashes of files , but that could explain the slight diffeernt for the code expiration date (just of theory of mine ;) )

for a complete list with the timestamp use this list for example ;

https://onedrive.live.com/?cid=201ecfa3dd196829&id=201ECFA3DD196829%21165&authkey=!AChGfR7JnrYGTiE

or it has nothing to do with that ;D

just groupees got 2 differents batches of keys ;)

Great idea for a thread.

It's too bad you can't add them to your account as giftable copies (I think?). That would make it much easier to keep track of.

Another one to Add:

Indie Gala Capsule Computers

Dracula 4 + 5 - Feb 14, 2015

Thanks, I had redeemed mine already.

It appears the groupees.com/sherlock had gog games redeeming at different dates!

Sherlock Holmes: The Silver Earring - expired
Journey to the Center of the Earth - worked

Sorry I can no longer see the dates with gogs recent depressing site downgrade. (yes, greyscale is depressing)

cant you request for the newer code ? i mean this is a purchase they should change the code so that it does not expire , did they mention during the sale of the bundle that the purchased codes will expire at a set time ?

2 more, this time, freebees:
Carmageddon Max Pack - Oct.14,2014
Dark Eye: Chains of Satinav, The - Jan. 20, 2015

Don't forget my previous post, sorry I can no longer get the dates, gog's "fresher/better gog" removed the ability to view redeemed/expired gifts now.

I did find it strange that the 2 gog games from a single specific bundle expire at different dates. Its from the same dev/publisher if I'm not mistaken too. (that sherlock bundle)

I added an "Other" section, though if you could tell me where they came from and when that would be useful (I also added my Realms of Arkania, but I can't remember where that was from.)

I only added the JtCE, since the Silver Earring was already expired. Unless people feel leaving expired ones would also be useful?

Good thread. I'd be tempted to leave the expired ones as well, so that this thread can also act as a more general catalogue for bundles that included GOG keys. Unless there already is such a thread.