This is how you apply custom game rules in the Windows Store app
1. Tap the new game button in the app bar, to launch the new game screen.
Tip: You open the app bar by swiping up from the bottom edge of the screen on a touch device, or right-click the mouse on a PC without touch screen.
2. Select how many players to participate in the game.
3. Select the custom game rules that you want.
The game rules are locked until you buy them.