For right now in Pokémon Pearl, I have 200 hours of gameplay in the game. Chaining, EV training, contests, and the Battle Tower have been things I have been working for, and that is probably why I have that much hours put into the game. Since chaining takes a while, and you have to wait and beat 7 trainers before you can get out of the Battle tower, those are the two that put most of my hours into the game.