AMD may have accidentally leaked the announcement of a PC version of Halo 3. Artwork for the game was briefly visible during the launch event for AMD's Ryzen 5 processor.
The launch event for the AMD Ryzen 5 processor was held in South Korea and featured artwork of several games, including Overwatch, Star Wars: Battlefront 2 and Halo 3.
It may be possible that the game will get the same anniversary treatment as the previous two Halo titles. Both Halo: Combat Evolved and Halo 2 received remastered editions and were both included in Halo: The Master Chief Collection.