Dance Dance Revolution Ultramix 4 is the fourth game in the series to appear on the Xbox. The mechanics are the same as they have always been: step on arrows on a dance mat in time with arrows on the screen. The soundtrack has more variety than previous entries in the series and has quite a few licensed tracks. There are various modes available including arcade, practice and workout. Also in this entry is a quest mode which gives you a career-type series of dances to earn money.