DSOGaming writes: “Halo 3 is a game that a lot of PC gamers wanted to play (especially since Halo 1 and 2 came out on our platform) and it appears that this will be possible in 2019 via the Xenia Xbox 360 emulator. YouTubes Emulators for PC has shared a video comparing the original X360 version with the emulated Xenia version using the DX12 API.”
Source: N4G PC Halo 3 is close to being fully emulated, video comparison between PC DX12 and original X360 versions