Here is the full list of all 30 SoulCalibur II HD Online trophies - there are 14 bronze, 10 silver, 5 gold and 1 platinum.
Unlock All the Trophies
Obtained All Weapons in Weapon Master
Ten Thousand Hits
Unlock All Characters
Acquired Soul Calibur in Weapon Master
Acquired Complete Soul Edge in Weapon Master
Victorious in Sudden Death
Ten Victories in Extra Survival Death Match
Became Lv 72 "Iron Edgemaster" in Weapon Master
Became Lv 40 "Gold Mercenary" in Weapon Master
Used Guard Impact against a Guard Break move
Defeated 50 Female Characters
Obtained New Costume in Weapon Master Shop
Successful Guard Break
Purchased New Weapon in Weapon Master Shop
Became Lv 6 "Platinum Neophyte" in Weapon Master
Five Successful Throw Escapes
Defeated 50 Male Characters
First Trial Point Cleared in Weapon Master
Twenty Perfect Victories
Team Battle Cleared
Guard Impact Triple Success
Three Successful Soul Charge Hits
Ten Ring Out Victories
Fought 10 Times in Online Mode
Won 5 Times in Online Mode
First Victory in Online Mode
Standard Time Attack Cleared
Victorious over Inferno in Arcade
Ten Successful Counter Hits