Struggle for the Sky

Reversi - a cozy offline board game

Flip the script. Place a disc to flip a row from sun to moon. Whichever side owns more discs when the sky fills wins.

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Inside Just One More · iPhone & iPad · iOS 18.2+ · Free with in-app purchases

Reversi in Just One More, Struggle for the Sky

📵Plays fully offline
🪶Four difficulty levels
🎲2 ways to play
👥Pass and play with a friend

How to play Reversi

Reversi across a twilight sky. Place a disc to flip a row from sun to moon. Whichever side owns more discs when the sky fills wins.

Take Turns Placing Discs

You play one side; your opponent plays the other. Place a disc by tapping any legal cell on the 8×8 sky.
Sandwich to Flip

A move is legal only if it traps one or more of your opponent's discs in a straight line (horizontal, vertical, or diagonal) between your new disc and another of yours.
Flipped Pieces Switch Sides

Every trapped disc in every direction flips to your color in one go. A single move can flip dozens if you set it up right.
Most Discs Wins the Sky

Play continues until no legal moves remain. Whoever has more discs on the board at that moment wins the round.

Four difficulty levels

Every level keeps its own streak, best and high score, so climbing costs you nothing.

Easy: The bot drifts. Picks moves at random.
Medium: The bot likes corners and counts the next move.
Hard: The bot plans four moves out and weighs mobility.
Very Hard: The bot reads the whole sky. Six moves deep.

2 ways to play Reversi

Classic Reversi plus 1 more, each with genuinely different rules rather than a fresh coat of paint. Every one keeps its own difficulty ladder and its own best score.

Pinwheel Reversi

Oh, how the tables are turning.

Spin a quadrant before every move

How Pinwheel Reversi differs

Spin a Quadrant First The sky is split into four 4×4 quarters. Before placing a disc you must rotate one of them a quarter turn (clockwise or counter-clockwise) using the spin handles that appear over each quadrant. Once you start spinning a quadrant, you can keep spinning that same one until you find the arrangement you want.
Then Place to Flip Rotations move discs around but never flip them. After your first spin you can keep re-rotating any quadrant until you like what you see. Then place a disc on a cell that traps an opponent's row between two of yours.
Use Spins to Open Sandwiches A great rotation lines up a row you couldn't reach a moment ago, or scatters a row your opponent was about to seal. The same disc can be a corner one turn and a center piece the next.
Most Discs Still Wins Play continues until neither side can place. Whoever owns more discs when the sky settles wins the round.

Reversi plays completely offline

Every round of Reversi is generated, played and saved on your own device. There is no account, no sync and no server to reach, so it works the same on a plane, in a tunnel or with the phone in airplane mode.

Questions about Reversi

Does Reversi work without internet?

Yes. Reversi generates every round on your device and saves your progress there too, so it plays exactly the same on a plane, on the underground or with the phone in airplane mode. Nothing in Just One More needs a connection.

How hard does Reversi get?

There are four levels. Easy is "The bot drifts. Picks moves at random." Very Hard is "The bot reads the whole sky. Six moves deep." Your streak, best and high score are tracked separately for each level, so moving up never costs you what you earned lower down.

Are there other ways to play Reversi?

Yes. One more game shares the Reversi board, changing the rules rather than the look: Pinwheel Reversi (Spin a quadrant before every move). Each keeps its own difficulty ladder and its own best score.

Can two people play Reversi on one phone?

Yes. Reversi offers pass-and-play alongside the bot, so two people can share one device and alternate turns. Personal stat chips are hidden in that mode, because a shared board is nobody's streak.

Is Reversi free?

Yes. Reversi and the other 68 games in Just One More are free to play and ad supported, with an optional one-time Remove Ads purchase. No game, level or difficulty is locked behind a payment.