Changelog for Patch 01.02c / GOG-3 (Windows and Mac) (added 05 October 2016):

- Miscellaneous bug fixes for Windows & Linux versions, Mac update coming soon

Changelog for Patch 01.03 / GOG-4 (Windows, Mac and Linux) (added 07 October 2016):

NEW: Added Key Remapping. Access it through the Options Menu.
- NEW: Added option to invert camera shoulder side. Available in Game Options.
- FIX: Fixed some occlusion culling issues on Chapter 11 and Chapter 12.
- FIX: Fixed some objectives not triggering correctly on Chapter 5, Chapter 9, Chapter 10, Chapter 11 and Chapter 12.
- FIX: Minor localization bugs.
- MISC: Added multiplayer version info on main menu.


** Plans for the next update **
- Improve general game performance.
- Add support for cross-region multiplayer.
- Add in-game interactions to co-op mode.
- Squash nasty bugs!

Changelog for Patch 01.03b / GOG-5 (Windows and Mac) / GOG-4 (Linux) (added 10 October 2016):

- FIX: Fixed bug whereby Hikaru would freeze in the 2nd phase of the boss fight.
- FIX: Fixed bug whereby camera would not recenter after respawning.


Plans for 01.04:

- Improve general game performance.
- Add in-game interactions to co-op mode.
- Squash nasty bugs!

Changelog for Patch 01.04 / GOG-6 (Windows, Linux and Mac) (added 17 October 2016):

- NEW: Added 'Swap Camera Side' button. Defaults to L3 (controller) or key X. Can be set in the redefine keys screen. Removed the 'invert camera side' option in Game Options, as its now obsolete.
- FIX: Improved performance on interior areas. Mostly noticeable in the Mausoleum (Chapter VI) and the cave at chapter V.
- FIX: Improved chapter IV performance by reducing the number of unused shadow casters.
- FIX: Updated audio engine and fixed some CPU spikes provoked by loading some sfx for the first time.
- FIX: The game doesn't try to 'fix' the player's resolution anymore, so resolution issues should be solved now. Just select and apply your desired resolution in Options, or in the settings.cfg.
- FIX: Fixed bug whereby archers stood idle until Aragami died once.
- FIX: Fixed bug whereby score events would be overwritten by consecutive events which led to confusion.
- FIX: Swapped camera side now behaves correctly when approaching a corner cover.
- FIX: Fixed bug whereby Aragami could glitch through surfaces by ledge leaping (sorry speedrunners! )
- FIX: Improved multiplayer server syncing.
- FIX: Redefine Controls screen now lets you add the same binding to multiple actions.
- FIX: Hitting ESC while redefining controls doesn't break your bindings anymore.
- FIX: Rebinding 'menu' keys won't break those keys in menus anymore.
- FIX: Leaping doesn't make you lose your crouched stance now.
- FIX: Removed Aragami 'invincibility' while stunned.
- FIX: Fixed some localization issues.
- FIX: Localized achievements to different languages.
- FIX: Increased score awarded by Shinen Kills from 100 to 125.
- FIX: Kills done while being seen by an enemy don't count as Stealth Kills anymore. Normal kills award only 50 points.


Plans for future patches:

- More progress improving game performance.
- Add in-game interactions to co-op mode.
- Fix any bugs reported.

Changelog for Patch 1.04b / GOG-7 (Windows and Linux) / GOG-8 (Mac) (added 24 October 2016):

- NEW: Added more player feedback in Hikaru boss fight. His orb will push you back if you try to attack him twice from the same side, and Yamiko will offer some insightful comments.
- NEW: Added Directx9 compatibility mode as launch option for windows users.
- MISC: Gamma range in Graphic Options has been expanded. Might help users with 'dark screen' issues.
- MISC: Ending cinematic can now be skipped.
- MISC: Changed engine light equation to have a more pronounced 'cel shading' style. This results in more clear contrasts between light and shadows in problematic angles.
- FIX: Improved general performance in some chapters by tweaking the Occlusion Culling parameters.
- FIX: Improved general performance in some chapters by reducing enemy activation distance.
- FIX: Warriors at the cinematic from Chapter VII are now not taken into account for chapter score.
- FIX: Fixed multiplayer bug whereby camera could stay black after dying.
- FIX: Fixed multiplayer enemy conversations.
- FIX: Fixed light barriers not activating in multiplayer.
- FIX: (Probably) fixed invisible enemies in multiplayer.
- FIX: Minor fixes in prop placement.
- FIX: Minor localization fixes.
- FIX: Other minor fixes.

Changelog for Patch 1.06a / GOG-8 (Windows and Linux) / GOG-10 (Mac) (added 22 December 2016):

- NEW: New SKINS menu lets you customize Aragami with new clothes and assassin masks.
- NEW: Added 3 difficulty modes and redefined default difficulty.
- NEW: Redesigned the Ranking and Score systems.
- MISC: Removed Sora automatically finding Aragami.
- MISC: Improved performance on some chapters by enabling experimental graphic optimizations.
- MISC: Hikaru's vision range is now progressive.
- MISC: Enemy vision range in ALERT is now progressive once they've lost the player.
- MISC: Increased Shadow Range intensity.
- MISC: Added new checkpoint on Chapter 12.
- MISC: Moved the default save location. Your saves should copy to the new location automatically. New locations are as follow:
- Windows: %USERPROFILE%/AppData/LocalLow/Lince Works/Aragami/
- OS X: ~/Library/Application Support/Lince Works/Aragami/
- Linux: ~/.config/unity3d/Lince Works/Aragami
- FIX: Reduced explosive light lethal radius.
- FIX: Red bushes now cover against archers.
- FIX: Sound should not travel to other 'rooms' now.
- FIX: Modified the scarf physics so that it doesn't get stuck with the sword.
- FIX: Killing the last enemy in a zone will now end the area alert.
- FIX: Multiplayer - Invisible warriors in Chapter 7 cinematic.
- FIX: Multiplayer - Minor fixes
- Other minor fixes.

Changelog for patch 1.07 / GOG-9 (Windows) / GOG-11 (Mac) / GOG-9 (Linux) (added 02 March 2017):

- NEW: Added Russian translation.
- NEW: Added Hungarian translation (thanks to Brechler Zsolt).
- NEW: Added Chinese translation (thanks to Another Indie).
- FIX: Gameplay crash caused by particle systems.
- FIX: Removed invisible collider which blocked path to a scroll in Chapter 10.
- FIX: Wrong objectives on Chapter 4.
- FIX: Shinen dissolving corpses already dissolved.
- FIX: Multiplayer - Shinen sometimes was killing enemies only on 1 client.
- FIX: Multiplayer - Hikaru sync issues.
- FIX: Multiplayer - Minor fixes
- Plenty of other fixes.

No editor in gog version?

Changelog for patch 01.07 / GOG-10 (Windows) / GOG-13 (Mac) / GOG-10 (Linux) (added 13 March 2017):

- NEW: Added UI feedback when a multiplayer invite fails.
- FIX: Main Menu buttons appearing in wrong places.
- FIX: Final boss sync issues.
- FIX: Main Menu navigation issues.

Changelog for patch 01.08 / GOG-11 (Windows) / (Mac) / GOG-11 (Linux) (added 04 May 2017):

- FIX: Fixed missing Chinese localization characters.
- FIX: Fixed missing Hungarian localization characters.
- FIX: Mouse speed setting was being ignored.
- FIX: Starting the first level with Shadow Creation and Show Objective unlocked.
- FIX: Several Objective UI issues.
- FIX: Enemies could stay blinded forever.
- FIX: Losing the crouch stance after an aerial kill.
- FIX: Fixed fatal crashes related to particle systems.
- FIX: Stuns from a warrior's Light Shield could leave the camera misplaced.
- FIX: Final boss area attack could remain active in the last cinematic on multiplayer games.
- FIX: Options and skills menus persisting on top of cinematics in multiplayer games.
- FIX: In Multiplayer, players were moving while sitting.
- FIX: Enemies could get stuck on bridges.
- FIX: Warriors could unsheathe their sword twice in a row.
- FIX: Several issues when using shadow techniques on the final boss.
- FIX: Other minor fixes.
- FIX: Minor level editor fixes.
- MISC: Reduced AI memory usage.
- MISC: Improved final boss area attack performance.

Changelog for Patch 01.09 (added 23 May 2018):

* ADD: Added "Auto Aim" option for the Shadow Leap mechanic. Can be toggled in Options menu. Life saver for players using controllers.
* ADD: Korean localization. No Gangnam Style emotes included, too late for that.
* FIX: Big performance improvements. Really.
* FIX: Lots of minor bug fixes and minor visual changes.

I was wondering whether they added that in their latest patch. That and is this game worth getting because of the patches or do the same problems (performance, checkpoints and the buggy controls) still exist even in the latest version?

I wanted to look into it since it's on sale.