Angry Bird’s latest installment has landed on Windows Phone store bit early, it seems. It is named “Angry Birds Go” and the listing at WP store is looks incomplete. The listing shows it available for free.
It is not playable even after downloading it on your device. The game was supposed to go live on 11th December, so may be the apps is still in Beta and the private link has already gone live by mistake.
Click the link here to download it on your device and give it a try.