Complete the following tasks to unlock the achievement and it's corresponding Gamerscore.

Bronze in Survival (Single) - 10 Gamerscore Points:
Won 20 Single Battles in Survival mode

Bronze in Survival (Tag) - 10 Gamerscore Points:
Won 20 Tag Battles in Survival mode

10 Wins in DOA Online - 10 Gamerscore Points:
Won 10 times in DOA Online mode

Completed Story Mode - 10 Gamerscore Points:
Completed Story mode once

5 Straight Wins in DOA Online - 10 Gamerscore Points:
Won 5 consecutive times in DOA Online mode

Bronze in Time Attack (Single) - 10 Gamerscore Points:
Completed ALL of the Time Attack mode Single Battles inside 6 minutes

Bronze in Time Attack (Tag) - 10 Gamerscore Points:
Completed ALL of the Time Attack mode Tag Battles inside 3 minutes 30 seconds

Silver in Time Attack (Single) - 20 Gamerscore Points:
Completed ALL of the Time Attack mode Single Battles inside 5 minutes

Silver in Time Attack (Tag) - 20 Gamerscore Points:
Completed ALL of the Time Attack mode Tag Battles inside 3 minutes

Silver in Survival (Single) - 25 Gamerscore Points:
Won 50 Single Battles in Survival mode

Silver in Survival (Tag) - 25 Gamerscore Points:
Won 50 Tag Battles in Survival mode

10 Straight Wins in DOA Online - 25 Gamerscore Points:
Won 10 consecutive times in DOA Online mode

100 Wins in DOA Online - 30 Gamerscore Points:
Won 100 times in DOA Online mode

Achieved Grade 'A' - 30 Gamerscore Points:
Received the grade of 'A' in DOA Online mode

Completed ALL Story Modes - 30 Gamerscore Points
Completed Story mode with ALL characters

Achieved Grade 'S' - 40 Gamerscore Points:
Received the grade of 'S' in DOA Online mode

Gold in Survival (Single) - 40 Gamerscore Points:
Won 80 Single Battles in Survival mode

Gold in Survival (Tag) - 40 Gamerscore Points
Won 80 Tag Battles in Survival mode

Gold in Time Attack (Single) - 40 Gamerscore Points:
Completed ALL of the Time Attack mode Single Battles inside 4 minutes 30 seconds

Gold in Time Attack (Tag) - 40 Gamerscore Points:
Completed ALL of the Time Attack mode Tag Battles inside of 2 minutes 30 seconds

20 Straight Wins in DOA Online - 40 Gamerscore Points:
Won 20 consecutive times in DOA Online mode

100 Wins in Survival (Single) - 50 Gamerscore Points:
Won 100 Single Battles in Survival mode

100 Wins in Survival (Tag) - 50 Gamerscore Points:
Won 100 Tag Battles in Survival mode

Achieved Grade 'SS' - 50 Gamerscore Points:
Received the grade of 'SS' in DOA Online mode

Unlock Secret Achievements.
The following is a list of Secret Achievements and how to unluck them.

0 Gamerscore Points:
Lose 5 Online matches in a row.

0 Gamerscore Points:
Lose 10 Online matches in a row.

0 Gamerscore Points:
Lose 20 Online matches in a row.

0 Gamerscore Points:
Achieve a grade 'D' in Dead or Alive 4 Online.

0 Gamerscore Points:
Achieve a grade 'E' in Dead or Alive 4 Online.

Achieve a Bronze Star - 10 Gamer Points:
Beat someone with a 10-14 win streak in Dead or Alive 4 Online.

Achieve a Silver Star - 20 Gamer Points:
Beat someone with a 15-19 win streak in Dead or Alive 4 Online.

Achieve a Gold Star - 30 Gamer Points:
Beat someone with a 20+ win streak in Dead or Alive 4 Online.

50 Wins in Dead or Alive 4 Online - 20 Gamerscore Points:
Win 50 games accumulatively in Dead or Alive 4 Online.

Rank B in Dead or Alive 4 Online - 20 Gamerscore Points:
Win enough Dead or Alive 4 Online games to achieve this rank. ALL Items in Survival Mode - 25 Gamerscore Points:
Collect ALL items in Survial mode.

Play Dead or Alive 4 for 5 hours - 10 Gamerscore Points:
5 Hours Played

Play Dead or Alive 4 for 10 hours - 20 Gamerscore Points:
10 Hours Played

Play Dead or Alive 4 for 100 hours - 40 Gamerscore Points:
100 Hours Played


Unlockable Costumes

Unlock Leon - 10 Gamerscore Points:
Complete Story mode with Zack.

Unlock Ein - 10 Gamerscore Points:
Complete Story mode with Hitomi.

Unlock Gen Fu - 10 Gamerscore Points:
Complete Story mode with Eliot.

Unlock Helena - 20 Gamerscore Points:
Complete Story mode with ALL characters.

Unlock Nicole (Spartan-458) - 20 Gamerscore Points:
Complete story mode with Helena.

Unlock Tengu - 20 Gamerscore Points:
Complete Time-Attack mode with ALL the characters including the secret characters.

Unlock ALL Costumes - 50 Gamerpoints:
Unlock ALL costumes including secret characters for every character.


Unlock Nassau Station:
A hidden sparring stage which just has a floor mat with no walls becomes available when Nicole (Spartan-458) is unlocked

Unlockable Characters

Leon:
Beat Story mode with Zack.

Ein:
Beat Story mode with Hitomi.

Gen Fu:
Beat Story mode with Eliot.

Nicole (Spartan):
Beat Story mode with Helena.

Helena:
Beat Story mode with ALL 16 characters.

Tengu:
Beat Time attack for ALL characters, including unlockables.


Unlock Nassau Station Stage:
This stage becomes available when Nicole (Spartan-458) has been unlocked


Unlockable Costumes

Beat story mode once with a character to unlock their costume which can be used in Story mode, their are 16 default plus Helena. Beat Time Attack mode with default settings on any difficulty for characters that can't be used in Story mode.

Bayman C3:
Beat Story mode with him one time per costume.

Brad Wong C3:
Beat Story mode with him one time per costume.

Ein C3-C4:
Beat Time Attack mode with him one time per costume.

Genfu C3-C4:
Beat Time Attack mode with him one time per costume.

Leon C3-C4:
Beat Time Attack mode with him one time per costume.

Christie C3-C4:
Beat Story mode with her one time per costume.

Elliot C3-C4:
Beat Story mode with him one time per costume.

Hayabusa C3-C4:
Beat Story mode with him one time per costume.

Hayate C3-C4:
Beat Story mode with him one time per costume.

Bass C3-C4:
Beat Story mode with him one time per costume.

Jann Lee C3-C4:
Beat Story mode with him one time per costume.

Zack C3-C4:
Beat Story mode with him one time per costume.

Helena C3-C5:
Beat Story mode with her one time per costume.

La Mariposa C3-C5:
Beat Story mode with her one time per costume.

Tina C3-C5:
Beat Story mode with her one time per costume.

Ayane C3-C6:
Beat Story mode with her one time per costume.

Leifang C3-C7:
Beat Story mode with her one time per costume.

Kasumi C3-C7:
Beat Story mode with her one time per costume.

Kokoro C3-C7:
Beat Story mode with her one time per costume.

Nicole (Spartan-458) C3-C7:
Beat Time Attack mode with her one time per costume.

Hitomi C3-C8:
Beat Story mode with her one time per costume.