Gamezebo Rating:

Over the past two years, the three-man team of Sirvo LLC has been narrowing in on mobile gaming gold. Although their only title as a trio was the brilliant Tetris-meets-. After regrouping from their award-winning walkabouts, Sirvo's sophomore offering is another puzzler, and one that sets the bar even higher than it was already stratospherically placed.

Threes! is the definition of deceptively simple. Its one-touch gameplay requires seemingly nothing more from players than the ability to swipe up, down, left, or right. Doing so will slide all tiles on its 4x4 game board in that same direction, with one of two results: either the tiles will simply move, or they will combine with other tiles. This is all you have to do to play Threes!, but it's only the beginning of its strategy and depth.