6. Threes! Free
Threes! Free is the perfect puzzle game for iPhone users. It involves merging cards within a tiny four-by-four board. The basic idea of the game includes match numbers.
The player slides a blue ‘1’ into a red ‘2’ and they combine to become a single ‘3’ card. Two 3s make a 6. Two 6s make a 12 and so on. The snag is every move you make slides every non-blocked tile on the board as well. If you’re fortunate or have planned, this can result in several merges in one move, if not, you end up with a mess to clear up and since after every turn a new card enters the board in a random spot on the edge you swiped from, planning is key.
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