https://wccftech.com/halo-2-pc-testing-today/

Halo 2: Anniversary and Halo 2 PC testing will begin later today and invites will be sent within a few hours, 343 Industries has confirmed.

Earlier this month we already reported on public flighting for both Halo 2 and Halo 2: Anniversary, and Community Support & Engagement Coordinator, Tyler “Postums” Davis, has now announced that public testing for Halo insiders will begin later today.