Reversi (Othello) on the Evo: trap your opponent's discs between yours and the whole line flips. You play black and move first; small dots mark every square you're allowed to play, so the rules teach themselves.
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An AI with opinions
The CPU judges positions the way club players do: corners are gold, the squares next to an empty corner are poison, and keeping its options open matters more than owning discs early. In the endgame it switches to counting discs, because by then that's all that counts.
That means it's beatable the honest way: play for corners, starve its moves, and don't celebrate a mid-game disc lead that means nothing.
Modes and score
Play 1P against the CPU, with your lifetime win/loss/draw record saved on the calculator, or 2-PLAYER pass-and-play. A side panel keeps live disc counts and whose turn it is; forced passes and game-over are handled automatically. Arrows move, ENTER plays the disc.