> When a new release of MAME comes out does it include the newest official hiscore dat? > Example is when MAME 221 comes out will it have this hiscore.dat?
The hiscore.dat in the MAME sources (and resulting release binaries) is usually the latest available Leezer's website at the time of source freezing. So, chances are very high that anything updated after the 0.220 release will be imported and taken in account for MAME 0.221.