As multiple systems like Mega Drive or Xbox 360 have an optional region lock with some games running in all regions, selected 2 or just one single region it would be really helpful to let people put that info in description field (not to add a new field). Such information is usually hard to find online and to check before buying a new game I usually have to download a rom from certain region and check the region lock status on emulator. The same goes with Blu-Ray movies and DVDs as many BluRay's only have one region marked on the box but are actually region free or work in 2 regions.