DJ Max Portable 2

There are several unlockable songs in the game, with various conditions on how to unlock them. Here's how to get them all! And thanks to wepon1984 for helping me figure out what some of the unlock methods were and for compiling an easy to read spreadsheet.

Effect - Code

Another Day - Get a combo of 4000 or above in FreeStyle
Brave it Out - Clear "Soul's Melody" missoin
Cherokee - Get a combo of 7800 or above in FreeStyle
Fentanest - Win 10 Network battles, or play 520 songs (excluding missions)
Memoirs - Reach Level 45
Minus 3 - Reach Level 70
NB POWER - Reach Level 82
NB RANGERS: Returns - Reach Level 55
Negative Nature - Reach Level 10
Nightmare - Clear "Bloody MANIcure" mission, or play 1860 songs (excluding missions)
Plastic Method - Clear "Missing You" mission
Rolling on the Duck - Clear 40 songs in Link Disc mode, or play 2730 songs (excluding missions)
Starfish - Clear "Rock or Die" mission
Syriana - Collect 17 different discs, or play 390 songs (excluding missions)
WhiteBlue - Collect all 22 discs, or play 670 songs (excluding missions)