If you want the true 2001 Xbox feel on PC (minus the Anniversary graphics), use the MCC version and select and "Original Audio Mix." Then disable mouse smoothing. You will get the most authentic Combat Evolved experience ever released on a computer—no emulation required.
You can officially download Halo: Combat Evolved Anniversary through several major platforms:
When 343 Industries brought the franchise back to PC between 2019 and 2021, they did not release Halo: CE Anniversary as a separate product (unlike the original Xbox 360 version). Instead, Halo: CE Anniversary exists inside .