Othello, also known as Reversi, is a game of flipping discs. Take turns placing a disc so that you trap one or more of your opponent's discs in a straight line between your new disc and another of your colour — every trapped disc flips to you. You must make a move that flips at least one disc; if you can't, you pass. When neither player can move, whoever has the most discs on the board wins.
The twist: three special squares are scattered on the board at the start. A bomb tile clears the discs all around it the moment a disc lands on it. A double tile makes the disc sitting on it count twice. And a wall tile is a permanent blocker — it never flips and it stops lines of flips passing through it. Play against the computer on Easy, Normal or Hard, or pass the phone for two players.
How many players? One against the CPU, or two sharing a phone.
What are the controls? Tap a highlighted square to place your disc.
Does it need signal? No. Once the page has loaded once, it works fully offline.