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.
Unlock All the Achievements
Ten Thousand Hits
Team Battle Cleared
Standard Time Attack Cleared
Victorious in Sudden Death
Ten Victories in Extra Survival Death Match
Victorious over Inferno in Arcade
Obtained All Weapons in Weapon Master
Unlock All Characters
Became Lv 72 "Iron Edgemaster" in Weapon Master
Acquired Soul Calibur in Weapon Master
Defeated 50 Female Characters
Acquired Complete Soul Edge in Weapon Master
Became Lv 40 "Gold Mercenary" in Weapon Master
Obtained New Costume in Weapon Master Shop
Defeated 50 Male Characters
Became Lv 6 "Platinum Neophyte" in Weapon Master
Purchased New Weapon in Weapon Master Shop
First Trial Point Cleared in Weapon Master
Twenty Perfect Victories
Ten Ring Out Victories
Guard Impact Triple Success
Five Successful Throw Escapes
Successful Guard Break
Ten Successful Counter Hits
Three Successful Soul Charge Hits
Used Guard Impact against a Guard Break move
Fought 10 Times in Online Mode
Won 5 Times in Online Mode
First Victory in Online Mode