Here is exactly what you got inside the box (or digital download) that you would not get from the standard base game later in 2022 or 2023.
This edition was released for PlayStation 4, PlayStation 5, and Xbox Series X. Core Gameplay and Features the king of fighters xv day one edition
Unlike many modern "Day One" labels that simply indicate a pre-order bonus, The King of Fighters XV Day One Edition was a specific retail SKU (Stock Keeping Unit). It was available both physically (for PS4, PS5, and Xbox Series X|S) and digitally for a limited time. Here is exactly what you got inside the