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Simon Says revives the iconic memory toy from 1978: watch the sequence, repeat it, then watch a longer one. Four colored buttons flash and chime in a pattern that grows by one step every round - the goal is simply to keep up. Each color is paired with a distinct tone, so you'll start remembering by sound as much as by sight, and the difficulty curve sneaks up before you notice. There's no skill tree and nothing to unlock; the only progression is your own working memory. Best on a touchscreen but plays equally well with mouse or keyboard. Aim for ten in a row, then twenty, then see how far concentration takes you.