Swim lazily over coral reefs, admiring the fish and listening to the soothing/annoying sounds of Hayley Westenra, the Kiwi Charlotte Church. If that's your idea of a good time, then welcome to your New Best Game Ever. If not, have a word with yourself and come back with an attitude readjustment, because you need to forget any preconceptions you may have had. Forever Blue is console psychotherapy, and it's totally brilliant.
It's also a proper game, believe it or not, with missions and objectives. That there's a complete lack of challenge in any of it only adds to its supremely relaxing nature, but you do get a feeling of accomplishment after acing another task or finding a particularly pretty sort of fish.