Successfully complete one of the following tasks to get a trophy:

Getting out more (Bronze): Play online at least once. 
Don't need no stinking powerballs (Bronze): Win without using a powerball, but 
you can still pick them up. 
Variety is the spice of life (Bronze): Win at least once in all game modes, 
including one online multiplayer match. 
Comeback kid (Bronze): Come back and win a game from 3 goals behind. 
Use your emotions (Bronze): Win at least once with each powerball. 
Leagues ahead (Bronze): Win at least once in all 4 divisions. 
You're a winner (Bronze): Win 10 games in a row. 
Gimme gimme world domination (Silver): Win 50 online games. 
Mini game master (Silver): Complete all 8 mini-games. 
League of your own (Silver): Win the top division three times in a row. 
Completist freak (Silver): Get 100% on time attack mode. 
Geon king (Gold): Score 200,000 points to be a Geon king