I have some good news for you. With the recent "New Xbox One Experience" and "Backward Compatibility" updates that launched on Thursday, something extra magical has happened: Xbox One has now become a region-free Xbox 360 for the applicable backcompat titles. This means that if a game on the backcompat program has more than one achievement list due to a regional "stack," you can now import the other version(s) and use them on your Xbox One without issue. Previously, you'd be required to purchase an entirely new console that matched the game's region (NTSC, PAL, or NTSC-J) to play games outside of your home region. No longer! What's more: you only have to buy any DLC once. If you own the Borderlands DLC on your home account, it will work with any version of the game.Currently there are five games of the initial 104 that have "stackable" achievement lists. You can play Japanese versions of Borderlands, Gears of War 2, and Just Cause 2, the German version of Rainbow Six Vegas 2, and the European version of Wolfenstein 3D. As more games are added to the backcompat program, likely more stackable versions will be playable as well.For a complete list of "Stackable" games for achievements, go here.