Changelog for Patch 1 / GOG-3 (Windows and Mac) (added 25 July 2016):

- Bug fixes addressing crashes and stability
- Fixed sound bug that also affected controls
- Audio tweaks: added some sound effects, changed the volume of others
- Fixed Junkie Plague challenge
- Tweaked Fast & Ravenous level
- Tweaked & fixed boss levels, including achievements

Changelog for Patch 2 / GOG-4 (Windows and Mac) (added 04 August 2016):

- Improved character movements
- Improved character animations
- Improved Balancing to some levels to reduce difficulty spikes
- Zombie Farming is now prevented in some levels
- Additional tooltips in the main menu
- Additional and improved Sound Effects
- Fixed sprinting zombies ignoring doors
- Fixed some achievements not unlocking correctly
- Fixed pausing the game while tutorial is playing
- Fixed issue where some visual effects were not working as intended on certain hardware

Changelog for Patch 2 Mac hotfix/ GOG-5 (Mac) (added 13 September 2016):

- This update for the OSX version fixes a few Galaxy-related issues.

Changelog for Patch 3 / GOG-5 (Windows) / GOG-1 (Linux) / GOG-7 (Mac) (added 21 September 2016):

- Added the Linux version of Zombie Night Terror
- Improved jump preview that now takes the zombie's size into account
- Levels now wait for a challenge to be completed before showing the end level screen
- Added brightness and gamma settings (accessible from the video tab in the settings menu)
- Added an option to change screen setting
- Added a colorblind option

Changelog for Patch 1.1 / GOG-6 (Windows) / GOG-2 (Linux) / GOG-7 (Mac) (added 31 October 2016):

Improvements:

- Improved jump preview to take zombie sizes into account & added an icon to preview death from high jumps
- Improved spit preview to avoid it from being blocked by stairs when the spit projectile can go through
- Added a notifications when the challenge is completed or failed before level completion
- Levels now wait for a challenge to be completed before displaying the end screen
- Levels now autocomplete when there is no more zombies present and objectives is complete
- Escape key can now be used to close menus, popups & tutorial screens
- Credits can now be skipped & won't close automatically
- Improve decors across all levels
- Improved run in background option, now works properly in full screen
- Added an option to limit frame rate, (default: 120 fps, min: 60 fps)
- Added an option to skip levels intro (cutscenes & tutorials)
- Added colorblind settings
- Added brightness and gamma settings
- Slightly increased bloom and grain to be more visible

Fixes:

- Added some invisible boundaries to levels to prevent characters from leaving the game area
- Fixed main menu tool-tips
- Fixed tool-tips appearing during cut-scenes
- Fixed tank stuck when mutating it while decelerating
- Fixed invalid overlord orientation after cancelling spit
- Fixed crawler run while playing start climb after a jump
- Fixed crawler able to climb out through doors
- Fixed crawler attack loop when jumping out of a vent shaft
- Fixed door being opened & closed instantly by a human when stating fleeing
- Reduced some glitches when placing 2 overlords too close from one another in opposite directions
- Fixed incorrect filtering with some tutorial icons, resulting in blurry icons
- Fixed start alert animations not playing
- Fixed pushed characters not playing fall animations
- Fixed some character playing damage animation while moving
- Fixed bonus barrel physic settings, they now rebound when hitting a surface
- Fixed a crash when accessing settings while in a level
- Allowed multiple game instances, this should fix Chrome preventing the game from launching on Linux
- Fixed some resolution issues, the game should not change resolution when opening settings anymore
- Fixed some characters being pushed back by some explosions and physic objects
- Fixed humans facing zombies behind them when attacking someone in front of them
- Fixed Tank unable to break some wall parts in rare conditions

Levels:

- Fixed Terror in The Elevator first generator wires not assigned to the correct target
- Fixed Prison Break indestructible door being closed by a cop, preventing zombies to go through
- Fixed an exploit in The Living Horde allowing an easy way to complete the level
- Replaced stairs platforms by water in Railway to Hell
- Reworked & fix boss 4 part 1 to reduce tank attack exploit
- Added an animation in boss 4 part 2 to hint which body part the player needs to attack
- Tweaked Fast & Ravenous to be easier & fixed car sprite sometimes replaced by the lawn mower
- Fixed a bug in Stadium Massacre allowing zombies to go in human spawn zones
- Fixed a visual glitch in Murderous Cortege pool
- Added a missing decor & improved secret room lighting in Pitch Black

Balance:

- Reworked character damage model to be more predictable (no more random) & reduce some human damages
- Tweaked some chapter 4 levels to slightly reduce difficulty
- Tweaked some characters timing in Deadlock, it should be easier to get from the barn to the main building
- Reduce the Sniper rate of fire by 20% (doesn't affect "This is not The End" level)
- Slightly reduced Bouncer's HP, normal zombies will need one less hit to kill him
- Increased Tank spit damage radius
- Slightly Increased Boss 1 damages
- Boss 2 is now more reactive when hit multiple times in a row

Changelog for Patch 1.1.3 / GOG-7 (Windows) / GOG-3 (Linux) / GOG-9 (Mac) (added 04 November 2016):

- Fixed last cutscene not giving back control to the player
- Fixed some issues in the first part of the final boss
- Fixed a case where a tooltip would stay visible without text
- Fixed a case where a zombie sprint attack animation would be played without moving
- Added a 1s cooldown on run mutation to avoid applying a run multiple time
- Prevent opening pause menu while showing end level screen
- Fixed entering a empty frame rate limit value resulting in an error
- Fixed TVs shutting down on level end
- Prevent the car from going too far in "Fast & Ravenous" level

Changelog for Patch 1.1.6 / GOG-8 (Windows) / GOG-11 (Mac) / GOG-4 (Linux) (added 10 November 2016):

- Controls menu now shows duplicated inputs to help resolve conflicts
- Updated exploding zombie visual effect
- Slightly increased zombies brightness
- Fixed Fast & Ravenous first cutscene
- Fixed Chemist Boss jumping in place when taking damage from a Tank Spit
- Fixed exploding crawlers incorrect position resulting in explosion not dealing damage correctly in tight spaces
- Fixed explosion not pushing back characters when kill by the explosion
- Fixed explosion dealing damage through walls in some conditions
- Fixed jump preview showing invalid hit icons in some conditions
- Fixed right click not deselecting mutation in the ending cutscene
- Fixed explosion affecting pliers in Murderous Cortege
- Fixed Complete All Levels & Challenges achievements unlocking at the wrong time
- Fixed controls not being saved correctly between sessions
- Fixed Tank dying from a lower height than intended when jumping

Changelog for Patch Patch 1.1.7 / GOG-9 (Windows) / GOG-5 (Linux) / GOG-12 (Mac) (added 02 December 2016):

- Fixed escape key not working for some players, preventing the pause menu from opening
- Fixed sniper sometimes not being able to fire from some angles when a few zombies where stacked together
- Balanced sniper in to counteract its increased firing efficiency and reduce difficulty in some levels
- Fixed sniper blood contamination animation not synchronized with the main animation
- Fixed incorrect material on the final boss resulting lightning issues
- Reduced last boss challenge timing to 2m30s from 5m30s to make it more challenging (it was not)
- Changed OpenGL backend on Mac OS to prevent black screens on startup

Changelog for Patch 1.1.10 / GOG-10 (Windows) / GOG-6 (Linux) / GOG-13 (Mac) (added 17 January 2017):

- Fixed end level screen textures being white

Changelog for patch 1.1.12 / GOG-11 (Windows) / GOG-14 (Mac) / GOG-7 (Linux) (added 02 February 2017):

- Added a hint to use a Tank at the end of The Descent
- Fixed crawler floating animation after sprint attack
- Fixed errors while loading a corrupted save file
- Fixed character effects being inverted in some case
- Fixed decors in House of the Rising Sun
- Fixed one of the chainsaw characters ignoring zombies in House of the Rising Sun
- Disabled tank spit rebound to avoid rebound on characters and make it work properly on the last boss
- Fixed some case where zombie sprint attack was wrongly performed
- Fixed health bar not always visible in the first boss
- Fixed zombies not playing fall animation when floor is breaking after a sprint attack
- Fixed human not reacting after getting hit while falling
- Fixed human vision not working after playing repulse animation
- Fixed zombies falling through the ground when stepping over a tile where a human is present

I thought I was the only one who played this. :P

Changelog for update 1.2 Moonwalkers Update (added 15th May 2017):

Improvements and bug fixes for the base campaign:
- Balancing of some levels
- New sound effects and audio improvement
- Humans rises from the dead only when killed by zombies
- Improved characters selection, mutations can now be applied while they are stepping over blocks

New Chapter:
- A new story across 10 new levels
- 6 new enemies
- Kamikaze (explode)
- Priest (burn enemies & allies alike when zombies are in its path)
- Priestess (invoke a protecting aura until out of danger)
- Ninja (Can climb wall and jump without taking damage)
- Astronaut (shoot lasers)
- Astrogoliath (bigger version, shoot lasers too)

News traps:
- Exploding barrels
- Plasma cannon
- Steam
- Time anomalies
- Low gravity levels

Changelog for patch 1.22 / (Windows) / (Mac) / (Linux) (added 24 May 2017):

- Fixed invalid decors in Ascension Night
- Fixed characters unable to escape through the last in Fast & Ravenous
- Tweaked Three Towers to prevent fire from staying up in the air
- Tweaked Escape velocity by removing a useless passage at the start of the level
- Tweaked A Stroll on the Moon to prevent Tanks & crawler from getting stuck
- Fixed missing challenge description for Alpha Complex
- Fixed resolution some issues on Linux
- Fixed language & resolution menus showing blocks instead of text on mac OS & Linux
- Fixed some progression issues for those who are not looking far enough
- Added an error message if there is a sound initialization error
- Recreate settings file if it's corrupted, this should fixed some startup crashes
- Fixed physic attaches not affected by explosions
- Fixed character selection not working when multiple zombies where selectable with no DNA available

Anything in there about making Event Horizon less of a pain in the ass? :P

Changelog for patch 1.3 (added 24 October 2017):

The new Level Editor Update allows you to do the following:
- You can create one level, or a whole chapter with several levels
- Create the setting, place traps and enemies, add props
- Choose enemies, tell them where to go and what to do
- Write your own dialogue for the enemies
- Select bonuses and mutations, and place them strategically
- Control the camera placement and movement
- Set the win/lose conditions for the levels, and design challenges for each level
- Select sound tracks to accompany your creation