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

You've Gone Platinum (Platinum): Complete all Death Mode and Beat School levels.
Campaign Complete (Gold): Complete all Campaign levels.
Death Mode: Hills n' Spills (Silver): Complete the Death Mode level.
Death Mode: Sparkle Darkle (Silver): Complete the Death Mode level.
Death Mode: Sneak n' Deke (Silver): Complete the Death Mode level.
Death Mode: Rowdy Cloudy (Silver): Complete the Death Mode level.
Death Mode: Thermogenica #1 (Silver): Complete the Death Mode level.
Death Mode: Thermogenica #2 (Silver): Complete the Death Mode level.
Death Mode: Mechanica (Silver): Complete the Death Mode level.
Death Mode: Aquatica (Silver): Complete the Death Mode level.
Death Mode: Extraterrestria (Silver): Complete the Death Mode level.
Death Mode: Disasteroids (Silver): Complete the Death Mode level.
Death Mode: Galaxanoids (Silver): Complete the Death Mode level.
Death Mode: Invaderoids (Silver): Complete the Death Mode level.
Death Mode: Break-a-noids (Silver): Complete the Death Mode level.
Death Mode: Purgatory #1 (Silver): Complete the Death Mode level.
Death Mode: Purgatory #2 (Silver): Complete the Death Mode level.
Death Mode: Event Horizon #1 (Silver): Complete the Death Mode level.
Death Mode: Event Horizon #2 (Silver): Complete the Death Mode level.
Death Mode: Cities (Silver): Complete the Death Mode level.
Death Mode: Touch The People (Silver): Complete the Death Mode level.
Death Mode: Spiral Staircase (Silver): Complete the Death Mode level.
Beat School: Straight Up (Silver): Complete the Beat School level.
Beat School: Tiny Groove (Silver): Complete the Beat School level.
Beat School: Hi-Hat Spice (not very spicy) (Silver): Complete the Beat School level.
Beat School: Lullaby (Silver): Complete the Beat School level.
Beat School: Chord Tweak (Silver): Complete the Beat School level.
Beat School: Chordaby (Silver): Complete the Beat School level.
Beat School: A Rolling Frolic (Silver): Complete the Beat School level.
Beat School: It's Getting Tense In Here (Silver): Complete the Beat School level.
Beat School: Uh Oh (Silver): Complete the Beat School level.
Beat School: Roll The Bass Dice (Silver): Complete the Beat School level.
Beat School: Cuts, Scrapes and Scratches (Silver): Complete the Beat School level.
Beat School: Muting Technique (Silver): Complete the Beat School level.