Block Out… In this version, a human player and iPhone take turns placing figures (pentominoes) on the 8x8 board so that they do not overlap. The figures look a lot like Tetris pieces, but are made of five (not four) blocks each; hence the "penta" in Pentamino.
The objective is to be the last player to place a figure on the board (so that there is no more room for another piece), effectively "blocking out" your opponent (iPhone).
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