I played Pro Evolution Soccer 2010 on a PAL Xbox 360 last night and some Age of Empires 2.
I take it all of the Xbox systems are region locked?
The xbox 360 is. Going forward they are not. Some xbox 360 imports will play on a NTSC box.
I have 2 PAL 360's and 2 NTSC-J 360's.
Is the Xbox region locked?
The Xbox 360 is region locked. Some of the games are not and can be played on any region system. 99% of the games are region locked.
The Xbox One and Xbox Series consoles are not region locked.