Microsoft shipped a native Xbox 360 emulator with its new backwards-compatible releases on PC — modders quickly got 360 games running with minor tweaks

Summary

Microsoft dropped four OG Xbox titles on PC a couple of days ago and they came with a native Xbox 360 emulator baked in. These games are packaged as Xbox 360 files, to the emulator runs them as such, then another emulator takes over to translate OG Xbox code inside the virtualized 360 environment.