stepmania

(i do have the above song for stepmania although that is not me playing)

well stepmania is a free dancing game thingy much like DDR (dance dance revolution)
but you add songs you download from the internet or make yourself now i find it a very fun game even though i hated DDR i have a few songs and found it a very fun game.

well in stepmania you use the keyboard and you download the songs, themes (i have one to make it look like super smash bros mellee XD), and announcers you can also grab 3d dancing characters

it has varius difiiculties but the real diffuculty depends on the song (some can be as real bitch to do take fury of the storm by dragonforce for example i can’t even get through 5 seconds of that)

link to site:   http://www.stepmania.com/