流暢、彈性、好玩，應援團音game---OSU!

link 1:

http://osu.en.softonic.com/

link 2:
http://www.brothersoft.com/games/osu.html

song下載網:

http://osu.ppy.sh/p/beatmaplist
申請後即可下載。

e.g.

http://osu.ppy.sh/s/24565