The GTA V Legacy PS2 ISO project was likely undertaken by a group of skilled developers who sought to bring the GTA V experience to the PS2. By modifying the game's code and adapting it to the PS2's hardware, they were able to create a version of the game that could run on the older console. This was no easy feat, as the PS2's hardware was significantly less powerful than the PS3 and Xbox 360 consoles that GTA V was originally designed for.