Here is the full list of all 12 Backbreaker Vengeance trophies - there are 7 bronze, 4 silver and 1 gold.
Complete all single player Tackle Alley challenges
Complete all single player Vengeance challenges
Complete all single player Supremacy challenges
Reach 10 combo multiplier in Tackle Alley
Showboat down the field for 30 yards in one wave in Tackle Alley
Collect 5 score patches in one wave in Tackle Alley
Complete an entire single player Vengeance challenge without giving up a score
Score highest on every wave of a single player Supremacy challenge
Complete a single player Tackle Alley challenge without losing a life
Collide 2 defenders into each other
In Tackle Alley use jump, barge and slide on all of the appropriate tacklers in a wave.
Complete a wave