SEGA updated the official website of the Sega 3D Fukkoku Archives 3 Final Stage 3DS game in Japan and released 6 free smartphone wallpapers on it. You can download each of them in different resolutions from here:

This is a special extra gift for the finished Twitter campaign where selected lucky Twitter followes could win original hoodies, t-shirt, mug and more.
The winners will be notified via Direct Message on the Twitter until January 13.