В стиме есть инфа о патче в новости о релизе, вот, но как понимаю это не основной патч, и там еще патч дров от Nvidia вышел:

PATCH NOTES

NOTE: This list contains some spoilers for quest and character names, as well as in-game locations!

Crash/Hang Fixes

Fixed an issue where the game would crash in the control mapping menu screen when moving the game window to a second screen using the Win Key + Arrow Key combination.
Fixed several other crashes

Performance Issue Fixes

Fixed an issue where the framerate would behave incorrectly in Ultimate Quality with a 3840x2160 display resolution.
Fixed an issue where the game would have performance issues when running in High End 4K display resolution.
Fixed an issue in the main quest “The Point of the Spear” where the game would have performance issues during the fight with the Sawtooth.
Fixed an issue in the side quest “Fatal Inheritance” where the game would have performance issues when entering the house.
Fixed an issue in the DLC expansion quest “Firebreak” where the frame rate would drop in certain places.
Fixed an issue where the framerate would drop on a path to in-game location Pitchcliff.
Fixed an issue where the game would encounter streaming issues on buildings when the player was near Mother’s Cradle.

Graphics Issue Fixes

Fixed an issue where the game would have graphics issues when approaching the Battery Facility and Firebreak.
Fixed an issue in side quest "Sunstone Rock" where there was a graphics issue behind Janeva near Sunstone Rock.
Fixed an issue where a flicker would occur when changing the Render Scale.
Fixed an issue where the Crafting sub-menu image would show a compressed image in different aspect ratios.
Fixed an issue with overlapping UI in Quest menus when using Mouse and Keyboard.
Fixed an issue where the extended blurred side bars for cutscenes and conversations did not display when in Borderless Mode.

Streaming Issue Fixes

Fixed an issue where the game would encounter streaming issues when using specific Adaptive Performance FPS settings.

Functionality Issue Fixes

Fixed an issue where a notification after a crash disappears before the user can accept the request.
Fixed an issue where an option in the Audio Output Device list did not register as a valid option.
Fixed an issue where the Audio Output Device can not be changed via the Settings > Audio page.
Fixed an issue in the Benchmark Tool where music would no longer play on subsequent runs of the Benchmark Tool after running and cancelling the tool early.
Fixed an issue in the Japanese SKU where the cross button is functioned as confirmation button when selecting choices during conversation and cutscenes instead of circle button

Localization Issue Fixes

Fixed an issue where the first-time loading screen would show placeholder text in every language except English.

Other Fixes

Fixed an issue where a user was not able to boot the game after closing it.
Fixed an issue where the game would display debug names in some instances.
Fixed an issue where several fonts were present in the Install folder of the game.
Fixed an issue where the Horizon Zero Dawn logo would not be displayed correctly.