When a supported game is started on the machine, the current or last-gen console opens the emulator and, in all regards, the game works as if it was running on an Xbox 360 or 2001 Xbox. The Xbox One and Xbox Series X/S are able to play Xbox 360 and original Xbox games through emulation software that makes your console think it's a last generation machine for the purposes of playing classic games. How does Xbox backward compatibility work?
But what games can you play from former console generations and how does it work? We explain all there is to know about the Xbox backward compatibility system here.