Testing for 343 industries' remastered Halo 3 is rolling out to PC "in the first half of next month".
In a new community update, 343i's Postums said the closed Halo 3 testing will permit the team to test its distribution pipeline, test updates to Challenges, gather feedback on the content, and "ensure all supporting systems are functioning properly in preparation for bringing Halo 3 to Halo: The Master Chief Collection on PC".
"Halo 3 is the next game in our lineup making its way to PC," wrote "Postums" (thanks, RPS). "In 2007, it was the Halo title that brought us Theater, Forge, and some of the community's most beloved gametypes like Grifball, Infection, and many more. Halo 3 holds a special place in many player's hearts and we know it's one of, if not THE most anticipated titles in the collection. In good news, public flighting for Halo 3 PC is on the horizon!"