Here is the full list of all 24 Deformers trophies - there are 4 bronze, 12 silver, 7 gold and 1 platinum.
Collect all trophies
Reach Level 20
Reach Gold ranking in Prestige
Consume 5000 pieces of debris (including gibs)
Kill an enemy using the pit in the center of Big Top
Get 10 Saves in Form Ball
Get 15 Assists in Form Ball
Score 50 goals in Form Ball
Score 25 goals in Form Ball
Complete a match online in Splitscreen
Score a Hat Trick in Form Ball
Score a goal in Form Ball
Get 500 Kills
Reach Silver ranking in Prestige
Get 250 Kills
Break 100 stacks
Get 100 Kills
Kill an enemy while you're cloaked
Get 50 Kills
Get 5 kills with a single Rampage
Reach Level 10
Earn your first Prestige rank
Level up!
Complete an online match