Why are some regions not backwards compatible?
Some games enjoy being nearly identical throughout all their regions. However in some instances, the differences between regions can be more than subtle. Just as the processes of making a game backwards compatible happens on a game by game basis, so does each region release of any given title. In the best case scenario, two region releases are nearly identical and after one release has been worked on, zero extra work is required to get the other versions up and running using the same emulator. However, this is usually not the case. Even games that differ subtly from one region to another usually require extra work to get all versions up and running. Unfortunately, not all games listed as backwards compatible are in all compatible in all regions. I have denoted this issue on affected games with the symbols shown below.
