NTSC
North America, Canada, Mexico, Japan, South Korea...
Full list of NTSC Countries here
Europe, United Kingdom,
Australia, New Zealand...
Full list of PAL Countries here
Disc Format
From my own testing, the NTSC version seems slightly more stable / responsive.
It also seems to play on most modern European DVD players... however... older PAL hardware *may* have an issue with NTSC discs - so a PAL version is available too.
Not sure? Please ask:
whenbeel@gmail.com