Changelog for Patch 1 (added 01 December 2017):

GOG specific updates
* Added GOG Galaxy achievements

Game update
* Fixed various freezes caused by controller disconnection/reconnection
* Fixed infinite controller rumble bug
* Fixed various freezes and soft-locks and crashes
* Improvements to saving and loading
* No longer possible to create a Mugman army.
* Fixed rapid-weapon-swap damage glitch
* Slight charge weapon damage reduction
* Charge weapon charge is now maintained during parry
* Now possible to unequip secondary weapon, Super, and Charm from equipment menu (Press Y to unequip)
* Mr. Chimes no longer gets stuck or goes off-screen
* King Dice’s Start Over square will now only trigger once per attempt
* Player 2 now appears in the King Dice board after being revived at the end of a mini-boss level
* Dice Palace score now properly resets when retrying the level
* Fixed improper hit boxes on the Devil's snake attack
* Fixed Devil's goat attack so it hits ducking players
* Elevator on Rugged Ridge no longer locks if Player 1 dies
* A+ grade now possible on Funfair Fever and Treetop Trouble
* No longer possible to damage bosses that are off-screen
* Fixed rare crash when parrying on Carnival Kerfuffle
* Fixed Roundabout shots not coming back on screen on select stages
* Baroness Von Bon Bon death results now properly displays progress on phase 3
* Dr. Kahl's Robot death results now properly displays progress on phase 1
* Fixed various minor collision bugs
* Various art and animation polish
* Minor sound effect bug fixes and polish
* Added spooky Mausoleum announcer
* Touch fuzzy, get a little dizzy

Changelog for Patch 1.1.4 (added 21 December 2017):

* Fixed soft lock when the player parries and dies at the same time
* Fixed issue where game appears in a tiny resolution
* Fixed rare issue where loading screen plays forever
* Fixed Cagney Carnation face attack so it consistently has proper anticipation cue timing

Changelog for Update (added 19 October 2018):

* Cuphead is now available for macOS!

Changelog for Patch 1.1.5 [OS X] / GOG-26511 (Mac) (added 09 January 2019):

- Added or fixed controller compatibility with the following gamepads: Xbox One Controllers connected via Bluetooth, and Nintendo Switch Pro Controller connected wirelessly.
- Please Note: Neither the Steam Controller nor Wired Switch Pro Controller are compatible with Cuphead on GOG.