Balloon Platform Defense
Hamsterball Sports allows 8 players to play on a single tablet by using touch controllers around the edges of the screen. There are three games for the hamsters to play, in a tournament that can continue for as long as you like. Download from the Google App Store here.
In ‘Atoms’, of which there have been several versions over the years, you had to put four of your atoms in a square to get them to explode into the neighbouring squares, taking those squares over if they contained an opponent’s atoms. If that caused any of those squares to get full, they would again explode. And now there aren’t just squares, but triangles, pentagons, etc., and in all sorts of three-dimensional arrangements. Download here for the Windows Phone.