Once installed:

Based on available archives, Build 1138403 is the Day One version of this ultimate edition. It arrived bundled with the base game, the original Season Pass (featuring the Episodes of Gladiolus, Prompto, and Ignis), the "Comrades" multiplayer expansion, and all the new content of the Royal Pack. This included an expanded map of Insomnia, a first-person camera mode, the Royal Vessel boat, and a host of new bosses and gear.

Even the best builds have quirks. For Build 1138403, if you encounter the "FFXV_WINDOWSEDITION.exe has stopped working" error, the community solution involves:

For PC enthusiasts, this is the ultimate way to play. It takes the console experience and unlocks the framerate, resolution, and graphical potential that the hardware was always capable of but limited by. It is a "Tech Demo" with a heart, offering a poignant brotherhood story wrapped in one of the most visually impressive packages on the platform.

From a technical standpoint, Final Fantasy XV: Windows Edition -v1138403 is an impressive game. The Luminous Engine, developed by Square Enix, has been optimized to take advantage of Windows 10's advanced graphics capabilities. The game supports:

A standalone cooperative mode where players create their own Kingsglaive soldier. You can team up with friends or AI companions to complete hunting quests and restore power to the shattered kingdom. Royal Pack Upgrades

Final Fantasy XV: Windows Edition (FFXV-Win) is the PC port of Final Fantasy XV, featuring higher-resolution textures, HDR support, unlocked framerate, additional photo and camera tools, and PC-specific options such as ultra-wide monitor support and mods compatibility. Windows Edition has received multiple updates/patches since release; builds are often identified by internal version numbers (e.g., v1.x.x or build hashes).

Today, while later builds are the standard for modern Steam installations, the 1138403 build remains significant in the modding and preservation communities. Its direct link to the "Royal Pack" bundle ensures that users of this build get the full, planned narrative experience, making it a stable reference point for understanding the game's core identity before subsequent updates altered its online infrastructure.