Dead or Alive 4 Cheats, Codes, Hints, Tips
Unlockable: Hitomi C3-C8
Complete story mode.
Unlockable: Ayane Costume C3-C6
You must complete story mode with her once.
Unlockable: Hidden Commercial
Complete story mode with all of the characters.
Unlockable: Tatami Stage
You must collect all of the costumes and finish all exercises in the game.
Easter Egg
When you play as Spartan 158 at the casino, a Warthog may occasionally be part of the traffic instead of the normal cars.
Hint: Achievement Shortcut - SS Rank
Host a room with only three members in it. The person that is the host will receive the rank. The other two players join the fight, and when the fight starts, they should exit to their dashboards. When the game notices that both players have left the game the host will instantly rank up to SS, fight (and win) a single battle after you do this and you will unlock the SS achievement.
Submitted by dashboardfan1982
Unlockable: Tengu
You must complete the Time Attach Modes of all the other 21 characters.
Unlockable: Tatami
Complete the story mode for all 17 characters. Unlock all hidden costumes for all 21 costumes. Unlock the system voice for all 22 characters.
Unlockable: System Voices
Complete a character's Exercise session in Sparring Mode. You can then go choose the voice heard during matches in the Settings menu.
Unlockable: SPARTAN-458
You must complete Helena's Story Mode.
Unlockable: Nassau
The Nassau Station stage will become available when the SPARTAN-458 character is unlocked.
Unlockable: Movie Theatre Mode
Beat story mode once.
Unlockable: Leon
You must complete Zack's Story Mode.
Unlockable: Helena
You must complete the Story Modes of all initially available characters.
Unlockable: Gen Fu
You must complete Eliot's Story Mode.
Unlockable: Ein
You must complete Hitomi's Story Mode.
Unlockable: Biolab Core
Completing Story Mode once will unlock the Biolab core Stage.
Unlockable: Alpha-152's System Voice
Unlock the System voices for all 21 characters (Ein doesn't have one).