Most people with a Nintendo DS would be familiar with
Elite Beat Agents and possibly Osu! Tatakae! Ouendan!
If you liked Elite Beat Agents enough youd know Ouendan.
Anyway to the point,
Some neat people have made a pc version of this type of game.
Osu! runs off community submitted tracks so youll find alot of copyrighted songs on there mixed into Osu! form.
You play with the mouse and clicking so its a little bit harder.
But all in all this is one fantastic pc adaption and i hope to see you's on it, im Dueler of course. ;)