When the platform first launched, Windows 8 inexplicably shut out games rated PEGI 18, meaning that, if/when the day came that developers began releasing games with Windows 8 features, Europeans wouldn't be able to get them from Microsoft's store.
It was a stupid oversight, especially since other markets like the US had no such issue, so it's good to see that Microsoft have sorted it out and changed the rules.
While the lock is still in place for regular apps, a loophole has been created for games, with Microsoft's policy now reading:
Apps with a rating over PEGI 16, ESRB MATURE, or that contain content that would warrant such a rating, are not allowed, unless the app is a game, is rated by a third party ratings board, and otherwise complies with these certification requirements.
Good move. Now all Microsoft needs to worry about is convincing developers to sell more serious games in their store, and convincing people to buy them...