Halo is an Xbox exclusive franchise and Microsoft currently has no plans to bring Halo 3 to PC let alone other entries in the franchise. However, using Xenia, an Xbox 360 emulator, you can not only boot but ca play the game on PC, however, you have to make some compromises.
While Halo 3 can be booted and played using the Xenia emulator on PC but, the emulation itself is far from perfect. As you can see in the video below, the game has a lot of glitches and performance is also very poor.
While the game isn’t in a playable state for the emulator but, we are sure that these glitches and frame rate issues will be fixed with future updates for the Xenia emulator.
Speaking of the emulator, Ni no Kuni is a PlayStation 3 exclusive that is playable on PC with RPCS3 emulator which by running it on a PS4.
The user was running Linux on the PS4 which he then used to run RPCS3 to run Ni No Kuni. The reason why he needs the RPCS3 is that the game is a PS3 exclusive and RPCS3 being a PS3 emulator, is required for the game to boot and Linux is required to boot the RPCS3.
However, these are not the only games that RPCS3 is capable of running as the emulator recently saw improvements for God Of War 3, Army Of Two and more games.
Not only that, Red Dead Redemption and The Last Of Us are also playable on PC with the help of RPCS3 emulator.
Halo 3 is a first-person shooter developed by Bungie exclusively for Xbox 360 and the game was also remastered for the Xbox One as part of Halo: The Mastercheif Collection.