Here is the full list of unlockable trophies for Back to the Future The Game Episode V: Outatime for the PS3.
A Prickly Pair (Bronze) – Had a conversation with a cactus
Crackpot Mended (Silver) – Restored Edna’s memory
Emmett Finds His Muse (Silver) – Emmett completes his spectacular failure the Expo
False Impressions (Bronze) – Impersonated three people over the phone
Full Fair (Bronze) – Get your money’s worth at the Expo
Get it on Tape (Bronze) – Recorded everyone at the Expo
Green Gobblin’ (Bronze) – Treated Desert Edna to an algae cake
Moonwalker (Bronze) – Busted a move, 80’s style
No Backups (Bronze) – Complete the glass house maze without going back up the stairs
Raising the Bar (Silver) – Prevented the Great Hill Valley Fire
The Future isn’t Writtten (Gold) – Returned home