The following essay explores the historical context of the franchise and why it was never technically possible on the PS2.
The request for an " Assassin's Creed PS2 ISO" involves a common misconception in gaming history: Assassin's Creed was never released for the PlayStation 2.
You can buy original physical discs for very cheap.
A "last-gen" version of the first Assassin's Creed was actually in development for PS2 and the original Xbox by a small team at Ubisoft Montreal. It featured a different story set in Cyprus with unique enemies. This project was ultimately cancelled in favor of focusing on the then "next-gen" PS3 and Xbox 360 versions.
They released for the Nintendo DS (a 2D side-scroller). But crucially, they also released a trilogy for the PlayStation Portable and Wii .