First, a reality check. Official patch notes for Horizon Zero Dawn on Steam and Epic Games Store currently list the latest stable version as (or similar localized numbers). You will not find "v1589" listed on Sony’s official support page.
Graphics & rendering
: Connecting a PlayStation Network account is now optional for playing on PC. horizon zero dawn remastered update v1589 portable
Expanded haptic feedback profiles for DualSense users on PC. First, a reality check
Refined the audio mix to reduce excessive reverb in specific environments and improved the balance of conversation dialogue. horizon zero dawn remastered update v1589 portable
If you are currently running an older version (v1570 or v1582), the jump to v1589 is substantial. Here is the granular changelog based on community analysis and patch notes for the :