This game is almost unsettlingly addicting.
Harvest Moon is a notable game simply for being one of the first dating simulations seen outside of Japan. One of the main portions of the game involves trying to marry (and raise a family with) one of five available women. As you can probably tell by the rating of this game, it isn't eroge (the Japanese storybook games with nudity in them), and most of the time you spend in the game isn't with the women, but doing mindless farming tasks.
That description might not sound fun, but Harvest Moon manages to not only make it fun, but so addicting that you might not even realize four hours has passed by when you finish playing.
The beginning of the game does drag a bit, especially when you first receive the ranch. It's littered with weeds, rocks, and stumps, and to remove the bigger stumps and rocks is a hassle. However, after clearing the land, the farming portion comes in. It sounds idiotic, but watering plants and sowing the soil is some of the most fun I've had in a game in quite some time.
Harvest Moon is the second best Virtual Console RPG out there ("Paper Mario" is another amazing experience, and even the unique addictiveness of Harvest Moon can't compete), and is a must buy if you consider yourself an RPG fan. I can't stress enough that this game is addicting -- if you enjoy that thing, it's all the more reason to get your hands on this excellent title.