Complete the following tasks to unlock Vita trophy rewards.

Trophy	How to unlock
Bazookin' (Bronze)	Kill 6 enemies with the bazooka.
Big Blimpin' (Silver)	Kill all penguins stationed on the big zeppelin in Chapter 8 (Single Player).
Bird Brained (Gold)	Brainbug at least one penguin from each of the 7 penguin ranks, including Putzki.
Brainbug Fever (Bronze)	Brainbug 30 enemies.
Dirigibully (Bronze)	Kill all penguins stationed on the small zeppelin in Chapter 8 (Single Player).
Dirty Half-Dozen (Gold)	Complete the Cooperative game mode.
Disgruntled Worker (Bronze)	Find 3 Signs.
Door Sentry (Bronze)	Kill 30 Penguins as they step out of a door.
Excessive Stacking (Bronze)	Stack all 3 crates near the end of Chapter 11 (Single Player).
Flight Instructor (Bronze)	Juggle an enemy for 10 seconds (Single Player).
For What Reason? (Bronze)	Launch the silo missile.
Hardboiled Orca (Gold)	Kill 300 penguins or clones.
Hardboiled Seal (Bronze)	Kill 100 penguins or clones.
High Treason (Bronze)	Brainbug the penguin above the star in Chapter 6 (Single Player).
Hindenburger (Bronze)	Kill all penguins stationed on the zeppelin in Chapter 3 (Single Player).
Hydrogen Run (Silver)	Escape the large zeppelin with 40 seconds or more on the timer.
Laser Assist (Bronze)	Kill an enemy by knocking him into a laser door.
Method Acting (Bronze)	Kill yourself as an Elite Penguin on Palace TV in Chapter 13.
Mission Complete (Gold)	Overthrow Putzki and liberate Albatropolis.
One Shot One Kill (Silver)	Kill 10 enemies, each with one gunshot.
Own Medicine (Bronze)	Kill a helicopter penguin with his own missile.
Own Pharmacy (Silver)	Kill 6 helicopter penguins with their own missiles.
Platinum Trophy (Platinum)	Collect all trophies.
Putzki Monologues (Bronze)	Find all four episodes of Putzki on TV in a single playthrough.
Rebellious Laborer (Silver)	Find 20 Signs.
Revolutionary Fighter (Gold)	Find all 45 Signs.
Riding the Thunderbolt (Gold)	Kill Mega-Brno in Hardboiled mode.
Too Many Too Soon (Silver)	Kill 3 enemies with one grenade.
Turncoat (Bronze)	Kill 20 enemies while brainbugging.
Two Birds One Stone (Bronze)	Kill 2 enemies with one grenade.