“Rune Exclusive” likely refers to an internal build name for the memory patch. If you’re stuck in Watery after the update, reboot the chapter from the main menu—your save is fine, just recalibrating shaders.
Alan Wake 2 Developer Defends Deal With 'Excellent Partner' Epic ... - IGN
The (often referred to as Update 1.15) was released on January 31, 2024, across all platforms. While "RUNE" refers to a specific scene group that released a cracked version of this update for PC, the official patch from Remedy Entertainment introduced several highly requested features and technical optimizations. Key Features Introduced
: This patch introduced several "under-the-hood" improvements, including faster graphics setting switches on PC and optimized lighting and texture memory usage across all platforms.