Dance Dance Revolution Ultramix 3

Cheat mode - Unlock everything:
Go and play with the end credits mini-game. Ignore the directions and
start hitting the opposite of what's on-screen directions. If you see
right arrows, hit left, if you see up, hit down etc. Keep doing this
until you hear audience applause to unlock all songs and bonuses.

Unlock songs:

Unlock Danca de Yuka song:
Trade the Concord, New Hampshire Flag in Quest mode
or
Finish the Rock-a-billy Willy song on all 3 difficulty level

Unlock Colors (Midihead's Sapphire Mix) song:
Trade the Little Rock, Arkansas flag in Quest mode

Unlock Brilliant R*E*D song:
Trade the Jefferson City, Missouri flag in Quest mode

Unlock Ever Snow song:
Trade the Bismarch, North Dakota flag in Quest mode.

Unlock Frozen Ray (Dirtyhertz Mix) song:
Trade the Jackson, Mississippi flag in Quest mode.
or
Reach an "A" rating on any song

Unlock Right On Time song
Trade the New Brunswick flag in Quest mode

Unlock Guidecca song:
Trade the Nashville, Tennessee flag in Quest mode
or
Finish Bag, (SAKURA), and The Legend Of MAX songs in heavy mode
and reach "AA" or better rating.

Unlock Hinawari song:
Trade the Charleston, West Virginia flag in Quest mode

Unlock Insaner song:
Play the credits two times.
or
Trade the Dover, Delaware flag in Quest mode

Unlock Rainbow Flyer song:
Trade the Victoria, British Columbia flag in Quest mode
or
Reach an "AAA" rating on any song

Unlock Jelly Kiss (Midihead's SMAK Mix) song:
Trade in the Newfoundland flag in Quest mode
or
Finish 10 songs

Unlock Legend Of Max song:
Trade the Phoenix, Arizona flag in Quest mode

Unlock Music To Your Head song:
Trade the Santa Fe, New Mexico Flag in Quest mode

Unlock Parade Of The Wooden Soldiers song:
Trade the Phoenix, Arizona flag in Quest mode
or
Modify the system date to December 25th

Unlock Love This Feelin' (Zonk Remix) song:
Trade the Yukon Territory flag in Quest mode
or
Reach an "AA" rating on any song

Unlock Bonus dancers
Get all of Honey's or B's puzzle pieces in Quest mode