Changelog for Updates (added 21 October 2019):

1.0.93
- A new NPC Goblin Merchant has been added, he can buy or sell items. Important: The Goblin - Merchant appears in the second story Act, so newcomers will need to unlock him first. All others will automatically see him when they visit the Church for the first time.
- Fixed a critical bug in the loot system: epic items dropped too often at all stages of the game, which broke the game's balance and made craft system useless.
- The system of strengths and weaknesses of enemies was redesigned. Important: Now you need to carefully study the strengths and weaknesses of enemies in each game location to choose the effective heroes according to the weaknesses of the monsters.
- The interface for displaying strengths and weaknesses has been redesigned. Important: now the player will see all information on all weaknesses both in Bestiary and battle tooltips.
- Changed attributes for all monsters from level 2 to level 5
-New items have been added: Huge Healing Potion, Rage Potion and Apple.
- The amount of experience required to level a character to lvl. 4 and lvl. 5 was increased
- Added a new monster "Mystical Weapon" to the Ruins of Lust location.
- Added a new passive Anger of Warrior skill to Tier 3 of the Warrior's skill tree.
-Active Braveheart skill transferred from Tier 3 to Tier 2 of the Warrior’s skill tree
- Some elements of the interface have been changed.
- Parallax effect on the combat background "Library in the Castle" was fixed.
-Fixed bug with icons of completed quests in the Church.
- Fixed minor bugs.

First Weekend update
- Increased the chance of the Powerful Prick skill triggering from 20% to 33%
- Added the "Continue" button when interacting with random encounters and books, now everyone can read the text of the random encounter or book in complete peace and quiet
- Reduced the number of kills required in Monster Hunter quests
- Fixed names of some variable parameters in the item descriptions (instead of HP now MAX HP, instead of RAGE now MAX RAGE)
- Added setting for displaying pop-up confirmation windows (always show, only important, only critical), change this setting at your own risk
- Added additional modifiers to increase the movement speed up to x4 in settings
- Added support for 1920x1200 resolution
- When the battle results window is opened, all other secondary windows will now be automatically closed
- Trap image in the Cemetery location has been changed
- Fixed some bugs

First Day Patch
- Interface elements now change their color depending on the current target when selecting the difficulty of the location
- Librarian battle in the quest "The Lost Blacksmith" in the Gluttony Forest was changed:
- One of the fallen warriors is now a Blue Crystal caster
- When a player escapes from this battle, he is placed back on the location map and gets into a previous cell -Changed the "Global curse" in Caves of Greed and Village of Envy

~~~ ~~~ ~~~

1.0.94
- Three new monsters: Blue Crystal, Dark Crystal and Golden Crystal have been added to the third act locations.
- One of the Pigman Shaman's weaknesses was changed.
- Added support for strengths and weaknesses of Poison and On Fire effects.
- Corrected placements of weakness icons in the character's battle tooltips.
- Localization of weaknesses in the Bestiary window was fixed.
- Added an ability to increase the number of selected items when you buy or sell to Goblin Merchant by holding the left mouse button.
- Fixed an error when the % sign was not displayed in the pop-up notification during the battle

~~~ ~~~ ~~~

1.0.95
- Added a new monster "Giant Bat" that can be found in all locations.
- Fixed a bug with impossibility to continue the fight sometimes if the enemy character was killed by Poison or On Fire effects
- The effects of Poison and On Fire no longer affect Sinlord Wrath's anger stacks
- Fixed an error when the fight did not end automatically if the last remaining enemy character died from passive skills of Warlock or Sorceress
- Difficulty curve in Act II and III has been changed (all monsters in these acts have higher levels now)
- Chance of finding weapons, armor and accessories in the chests is reduced from 20% to 12%

~~~ ~~~ ~~~

1.0.96
- A bug has been fixed in which the fight couldn’t end after two or more deadly blows were dealt to the enemy.
- An error was corrected in which two identical equipment items were awarded for winning the battle.
- Reduced armor and weapons drop rate.
- Some bugfixes.

~~~ ~~~ ~~~

1.0.97
- New Tower of Trials location has been added to the World Map. It contains:
1. Ladder mode: three tournaments, after which the player will receive valuable rewards
2. Training mode: allows you to fight random enemies
- Graphics of the "Village of Envy" location have been updated.
- Added NPC tags in the "Old Church" (if they are not visible)
- Changed some interface elements in combat mode
- New sounds have been added for some of the Sinlords

~~~ ~~~ ~~~

1.0.98
- The "Location map" UI-window has been completely redesigned (called through the "Map" button or "M" key).
- Every boss and Sinlord now has a Demonic Protection buff that protects them from some effects. Don't be afraid, previous versions also had this buff, but it wasn't displayed visually.
- There is a restriction on escape from combat. Now you can escape from the battle only starting from the 3rd round of the battle.
- Added an ability to change audio settings in the "Settings" UI-window: mono, stereo, quadro, 5.1, 7.1 and prologic.
- Added French translation from the community (special thanks to Targus for translation and Killpower (webmaster of www.rpgjeuxvidéo.com) for proofread).
- Slight interface changes.

~~~ ~~~ ~~~

1.0.99
- added German language localization;
- fixed a bug where the trade icon did not appear above the head of the Goblin-Merchant NPC;
- added the minimap window zooming ability;
- fixed minor "hot keys" mechanics errors.

Standalone installers updated (1.0.90 ⇒ 1.0.99): 21 October 2019.

When will the DLCs and the Halloween Madness event be updated on GOG too?

I cannot say much about the DLCs but the Halloween Madness event was just updated for me as of 30 minutes to this post.

Important update, 18 november 2019, by Sin Slayers:
Snow peak already available!

Greetings, slayers!
Today is an important day in the world of Sin Slayers. The rift in the Church has finally opened! Now you can travel to a distant frozen land called "Snow Peak" and meet new playable heroes. North lands are captured by the Ice Queen. A former sorceress is now a dangerous woman, enslaved by magic. Battle and victory over her is the main goal of this adventure.
In addition, you will also find new items to craft and special artifacts. New traps and events will make you worry about your next step. New monsters will be formidable opponents even for the most experienced heroes.
Please note that the DLC is free for all owners of the main game!

Full list of update 1.2.01 changes:
. New global map of the rift;
. New location "Snow Peak" with new events, traps and items;
. Two new heroes: "Northerner" and "Blood Mage";
. New enemies;
. Added user-translation support for community translations;
. Fixed bug with endless Stun effect;
. Changed the speed of some flying objects;
. All backers from the Brightlocker platform are added to the titles.

Changelog for Update 1.2.03 (23 December 2019)

- The new item is the Holiday Candy, which will drop from enemies throughout the event;
- During the event, the Goblin merchant will have new items to buy - Christmas outfits for the heroes. They can be bought for a new event currency;
- Thematic redesign of some locations;
- During the event you’ll be able to buy four new outfits for your heroes: Defender, Huntress, Inquisitor and Blademaster


Standalone installers, and those of its DLC, updated (1.2.01 ⇒ 1.2.03): 23 & 24 December 2019.