osu! Is basically an online rhythm game. Game levels are called beatmaps. In each beatmap, a song will play and different hit elements (hit circles, sliders and spinners) will appear on the play field. Players must use a pointing device to manipulate these elements in time with the playing song's rhythm in order to earn points.
For this thread, feel free to discuss your favorite beatmaps, your latest osu! achievements, and even set up game rooms with PC members!
You can get osu! here if you're looking to download it.