Changelog for patch 1.3.8 (16 November 2017)
- Fixed game over screen not showing in some levels
- Improved game over screen animation
- Fixed progression not unlocking the next chapter properly
- Fixed an error preventing chapter edit menu from working
- Added an error message in chapter edition when there are missing levels in the level list
- Fixed removing alternate levels in chapter menu resulting in an incorrect state
- Rename the "Localize" Field to "Use Official Dialogue" in the dialogue editor to reduce confusion
- Fixed dialogue editor not updating the "official dialogues" preview
- Fixed some blank dialogues in imported levels after editing existing dialogues
- Fixed some typos in the editor
- Fixed last level of Moonwalkers not loading the end chapter cut-scene
- Fixed temporal anomaly animations
- Fixed some recurring errors in the level editor
- Fixed community chapter unable to load next level if there were no end cut-scene
- Fix brightness and gamma settings
- Fixed some input field in level settings not working as intended
- Fixed character selection not working properly in level editor preview mode
- Fixed resizing moving decors changing the height of the decor
- Changed fire order to try to fix a glitch in the explode preview

Changelog for Patch 1.3.9 (11 January 2018):

- Fixed Braindead achievement
- Added Spanish translation
- Editor: Fixed selection menu not showing content after selecting an object with a lot of components
- Editor: Fixed not being able to select scrolling foreground props
- Editor: Fixed scrolling props not painted at the correct size
- Editor: Fixed a recurring error in paint menu when closing the editor with a prop selected
- Editor: Fixed gravity setting
- Editor: Fixed level 504 incorrect name
- Fixed a missing animation in blood harvest cut-scene
- Fixed being able to zoom in tutorials

Changelog for Patch 1.3.13 (added 20 July 2018):

- Fixed a case where the chemist boss would roll forever
- Fixed overlord pause setting not reflecting the actual value
- Tweaked the Living Horde level to fix the snipers position and the chemist not moving
- Tweaked fire position in The Three Towers level to prevent a bug with the crawler
- Fixed DNA preview text not showing when the time was paused
- Fixed "save as" in level editor, the correct level was not loaded
- Fixed Pancake achievement not working
- Fixed Zombie Apocalypse achievement unlocked by Moonwalkers levels
- Updated Unity version
- Added missing intro logos
- Editor: Fixed signal preview lines not visible after loading a level
- Editor: Fixed typos in some brush names
- Prevent saving in levels already finished
- Fixed corpses never disappearing after new ones appeared
- Fixed zombies glitching while attacking some characters
- Fixed being able to open multiple settings menu click behind it while ingame
- Fixed progression issues in the level editor
- Fixed errors when playing some sounds
- Fixed corpses being removed too quickly
- Fixed tank getting stuck after falling during a dash
- Fixed fast zombies sometimes missing a door they should have attacked
- Reduce CPU usage when using fast forward

Changelog for Patch 1.3.16 (added 31 August 2018):

- Fixed characters sometimes not dying when falling as they should
- Fixed some physic objects passing through walls
- Fixed scream visual effects not playing
- Fixed a crash on startup if the settings file is empty
- Fixed an error when loading empty custom chapter or level files, preventing the game from loading properly
- Fixed an error when launching a custom level from the level editor resulting in tanks getting stuck in breakable walls
- Updated Gog Galaxy SDK to try preventing errors with authentication
- Achievements are now disabled if there is an error with retrieving achievements stats

Changelog for Patch 1.4.4 (added 03 January 2019):

General
- Update FMOD to version 1.10.09, this should fix some starting issues on a wide range of systems
- Reworked the ways files are saved to disk, this should reduce file corruptions
- Added a workaround when starting the game with incorrect resolution settings
- Improved scene transition animations by removing some stutter
- Removed a freeze when loading end level menu
- Added an option to disable screen shake
- Fixed level selection menu not playing music when accessing it from end level menu
- Fixed pause menu not pausing the level music
- Fixed duplicated level ids in custom chapters resulting in progression issues, existing custom levels needs to republished to the workshop to work properly


Gameplay
- Fixed missing 'sniper 2' fall landing animation
- Fixed being able to open multiple spit menu on a single overlord
- Fixed a glitch when zombie was attacking an enemy through stairs
- Fixed zombies getting stuck on stairs
- Fixed humans changing target to zombies farther than the current one
- Fixed snipers starting aim animation while moving after fleeing
- Fixed regression in physic calculations resulting in some object behaving differently in fast forward
- Fixed level timer being started while the scene transition was playing
- Fixed patrolling humans sometimes resuming on the wrong waypoint
- Removed an invisible block from level 408.2
- Removed a block in level 407 preventing her from hitting targets
- Fixed Draw Windows being unstable on level startup, resulting in them slowly moving away from their anchors
- Fixed spit preview not taking hooks and projectiles into account
- Fixed a glitch with Gertrude when jumping above while attacking
- Slightly reduce Gertrude attack range to make it easier to jump over her


Level Editor
- Disabled contest toggle in publish menu (it wasn't doing anything anyway)
- Removed keyboard shortcut to move camera to avoid conflict with input
- Fixed cursor in level editor preview mode
- Fixed error in level editor selection menu
- Fixed moving object not working in some cases
- Level Editor: Fixed some errors in tutorial editor
- Fixed camera placement
- Fixed challenge editor input fields not playing nice with decimal numbers
- Fixed loading level issues
- Fixed resizing invisible walls affecting other colliders

Changelog for Patch 1.5 (24 February 2020):

- New Languages : Chinese Simplified, Korean, Japanese
- New Unity version that should have better performance
- Some bug fixes that were found during porting the game on Mobile & Switch
- The game size has been drastically reduced, from 1,5 GB when released to 1 GB on version 1.4 to around 500 MB on this version!


Linux standalone installer updated: 1.4.4 ⇒ 1.5; Windows & Mac not updated yet.

Changelog for Patch 1.5.1 (25 February 2020):

- New Languages : Chinese Traditional
- Fixed issues with Tanks something getting stuck on slopes
- Tweaked Blood Harvest to avoid the Harvester being duplicated
- Fixed some achievement issues


Standalone installers updated:
- Windows & Mac: 1.4.4 ⇒ 1.5.1;
- Linux: 1.5 ⇒ 1.5.1

I wonder why I was unable to access the Linux version until now. Was it because I was using windows?

When using your browser, you have to switch the OS from (the default) Windows to Linux for the standalone installer to show up. Not sure how things work when using the GOG Galaxy client to access your library.

;-D