• Dance wih Me image by Andrew Brown from Fotolia.com
  
  Dance Dance Revolution SuperNOVA comes from the popular game series Dance Dance Revolution. Players must dance in time to the songs, pressing on arrows with precision in order to get the highest score possible. The "DDR" series is known for its huge library of songs with each release, and some of the best ones being hidden until certain conditions are met.
  
  

Extra Boss Songs

• Play under "Game Mode" and clear a song on "Expert" difficulty with "AA" grade or higher. This will allow you to the opportunity to play "Extra Stage" where you can pick any song, including boss songs marked in red. The catch is that the song modifications are set to "1.5 Speed," "Reverse Scroll" and "Rainbow Arrows." Clear a boss song in "Extra Stage" with an "A" grade or higher, then buy it at the game's shop.
  
  

Chaos

• "Chaos" is a song playable only in "Encore Extra Stage." To get this, first pass "Extra Stage" with a grade "A" or higher to access Encore Extra Stage. Then, pass the song "Chaos" with a "AA" or higher. You will then be able to purchase this in the shop and select it on "Game Mode."
  
  

Alternate Ways to Unlock Boss Songs

• There is another method to acquiring boss songs besides getting an "A" grade in "Extra Stage." You must be in "EX Showdown" mode, then complete the following songs: "Nitro," "The Las," and "The Last Diamond." This will unlock "Max300 Super Max-Me-Mix," "Chaos," "Healing-D-Vision," "Fascination Maxx" and "Fascination Eternal Love Mix."