The game was developed by Bungie and published by Microsoft Game Studios. Because Microsoft owned the intellectual property and used the title to launch the original Xbox in 2001, Halo remained a strict console exclusive. Why People Thought a PS2 Port Was Possible

Early builds of Halo were showcased for both Mac and PC. Many assumed a PS2 version would naturally follow the industry trend of the time.

🟢 : Halo: Combat Evolved launched in 2001 exclusively as a killer app for the original Microsoft Xbox . It was later ported to Windows PC and Mac, but never to a rival Sony console. 🕹️ How to Address Your Question

In June 2000, Microsoft announced the acquisition of Bungie. The news sent shockwaves through the industry. Halo was suddenly pulled from the Mac and PC lineups and transformed into an Xbox exclusive. The deal was done, the PlayStation 2 version was cancelled before it was ever officially announced, and the rest is history.