Full list of all 30 SoulCalibur II HD Online achievements worth 400 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox 360.
Used Guard Impact against a Guard Break move
Fought 10 Times in Online Mode
Obtained New Costume in Weapon Master Shop
Twenty Perfect Victories
Became Lv 6 "Platinum Neophyte" in Weapon Master
Defeated 50 Male Characters
Five Successful Throw Escapes
Ten Ring Out Victories
Purchased New Weapon in Weapon Master Shop
First Trial Point Cleared in Weapon Master
Guard Impact Triple Success
Three Successful Soul Charge Hits
Team Battle Cleared
Standard Time Attack Cleared
First Victory in Online Mode
Successful Guard Break
Victorious over Inferno in Arcade
Ten Successful Counter Hits
Unlock All the Achievements
Unlock All Characters
Ten Victories in Extra Survival Death Match
Victorious in Sudden Death
Ten Thousand Hits
Acquired Complete Soul Edge in Weapon Master
Acquired Soul Calibur in Weapon Master
Became Lv 40 "Gold Mercenary" in Weapon Master
Became Lv 72 "Iron Edgemaster" in Weapon Master
Obtained All Weapons in Weapon Master
Defeated 50 Female Characters
Won 5 Times in Online Mode