Change/remove Female Fighter outfits:
While at the character selection screen, press SQUARE or TRIANGLE instead of pressing the "X" button when choosing a female fighter. You will hear a different sound upon selecting a character. This will change the color of their bra or panties-- or even remove an entire undergarment like Christie's bra on her default costume.
Zack as system voice:
Complete Zack's command training to unlock his system voice.
Donovan as system voice:
Complete Alpha-152's command training to unlock Donovan's system voice.
Complete Arcade mode twice to unlock music from DOA2 and DOA3. Note: for free Core Fighter versions, this part requires a paid DLC.
"OMG Breast Motion" option:
Unlock the "Failure Teaches Success" achievement or trophy to unlock the "OMG Breast Motion" option.
Fighting Entertainment - Have your first fight outside of Training or Versus modes.
Rivals - Register a fighter in your Fighter List.
Rival Rumble - Fight online.
My Fight, My Rules - Create your own online lobby.
Get out there and Fight! - Play a Lobby match.
Fighting For Real - Play a Ranked match.
You Asked for It! - Set "Throwdowns" to "Accept" and have a Throwdown in Versus, Arcade, or Free Training mode.
Arcade (Solo) Cleared - Clear 1 course in Arcade (solo) mode.
Arcade (Tag) Cleared - Clear all courses in Arcade (tag) mode.
Time Attack (Solo) Cleared - Clear 1 course in Time Attack (solo) mode.
Time Attack (Tag) Cleared - Clear all courses in Time Attack (tag) mode.
Survival (Solo) Cleared - Clear 1 course in Survival (solo) mode.
Survival (Tag) Cleared - Clear all courses in Survival (tag) mode.
Fledgling Fighter - Fight a Versus (solo) match.
You're It - Fight a Versus (tag) match.
Your Education Begins Now - Play in Tutorial.
A New Challenger Appears! - Played in Combo Challenge.
On the Edge of Your Seat - Play Spectator mode.
Fighter, Know Thyself - View your results in Fight Record.
Ahhh, Memories - View your photos in the Album.
Say Cheese! - Take a photo in Spectator mode.
How Do I Fight? - Display the Move List.
How Do I Fight Like a Pro? - Display the Move Details.
A Fight to Remember - Save a replay.
Turn it Up - Change the background music settings.
Who's Got Popcorn? - Watch a movie.
Safety First - Turn Danger Zones off on the Stage Select screen.
Power in Numbers - Have a Team Fight.
First Tag Team - Fight a tag match.
Down You Go - Successfully attack during a Cliffhanger.
Cliffhanger Comeback - Successfully block an opponent's attack during a Cliffhanger.
Blow 'Em Away - Successfully land a Power Blow.
We Have Liftoff! - Successfully deliver a Power Launcher.
Rival Rampage - Fight online 10 times.
Gesundheit! - Trigger the Special Danger Zone in The Show.
Tango Kilo November - Trigger the Special Danger Zone in Hot Zone.
Catch and Release - Trigger the Special Danger Zone in Sky City Tokyo.
Anybody, Anytime, Anywhere - Set "Throwdowns" to "Accept" and have 10 Throwdowns in Versus, Arcade, or Free Training mode.
Training Hard - Play Free Training mode for 1 hour.
Exercise Newbie - Complete all moves for a character in Command Training.
A Fighter is Born - Complete all lessons in Tutorial.
The Power of Two - Perform 10 kinds of character-specific tag throws.
Change of Power - Press H+P+K during a Power Blow to tag in a partner and deliver a Tag Power Blow.
I Read Every Move - Win without taking any damage.
Failure Teaches Success - See 10 characters' losing poses.
DOA5 Ultimate Is My Life - Fight online 100 times.
Unchallenged Champion - Complete all lessons for a character in Combo Challenge.
DOA5 Ultimate Master - Earn all Bronze, Silver, and Gold trophies.