A week ago we spotted a quick Halo 3 image on AMD's Ryzen event in Korea, hinting Halo 3: Anniversary could drop on PC sometime soon. But 343 Industries steps in to clarify that Halo 3 PC isn't happening.
343 Industries Community Manager Ske7ch squashed the rumor on Reddit, saying the studio has debunked Halo 3 Anniversary remaster multiple times--it wasn't true then, and it's not true now.
"I've been here just about 6 months now and haven't ever heard of one single mention of Halo 3 coming to Steam nor Halo 3 anniversary being made. In fact, it's been completely debunked multiple times over. Sorry to say but there's no plans nor any work underway to make this happen (though personally I can't deny it would be sweet)."