Here is the full list of all 30 SoulCalibur II HD Online trophies - there are 14 bronze, 10 silver, 5 gold and 1 platinum.
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Ten Thousand Hits
Standard Time Attack Cleared
Victorious in Sudden Death
Fought 10 Times in Online Mode
Won 5 Times in Online Mode
Unlock All Characters
Obtained All Weapons in Weapon Master
Became Lv 72 "Iron Edgemaster" in Weapon Master
First Victory in Online Mode
Ten Victories in Extra Survival Death Match
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
Used Guard Impact against a Guard Break move
Three Successful Soul Charge Hits
Successful Guard Break
Twenty Perfect Victories
Five Successful Throw Escapes
Obtained New Costume in Weapon Master Shop
Defeated 50 Male Characters
Guard Impact Triple Success
Purchased New Weapon in Weapon Master Shop
Became Lv 6 "Platinum Neophyte" in Weapon Master
Ten Ring Out Victories
First Trial Point Cleared in Weapon Master
Team Battle Cleared
Victorious over Inferno in Arcade
Ten Successful Counter Hits