Here is the full list of all 12 Laser Disco Defenders trophies - there are 7 bronze, 4 silver and 1 gold.
Try out every outfit combination
Get to cave 21 in endless mode
Pick up more than 20 hearts in one game
Get to cave 14 in endless mode
Complete story mode with all characters
Complete story mode with Liz
Complete story mode with Donna
Take out 1978 enemies
Complete a cave with more than 50 lasers in it
Complete story mode with Tommy
Survive 8 caves without taking a hit
Complete story mode with Mr. Baker