Trophies:
Bronze trophies
Hardboiled Seal – Kill 100 penguins or clones.
Disgruntled Worker – Find 3 Signs.
Flight Instructor – Juggle an enemy for 10 seconds.
Own Medicine – Kill a helicopter penguin with his own missile.
Door Sentry – Kill 30 Penguins as they step out of a door.
Brainbug Fever – Brainbug 30 enemies.
High Treason – Brainbug the penguin above the star in Chapter 6 (Single Player).
Turncoat – Kill 20 enemies while brainbugging.
Two Birds One Stone – Kill 2 enemies with one grenade.
Bazookin’ – Kill 6 enemies with the bazooka.
Friendly Transit – Carry the other cooperative player for 500 meters in the same chapter without dying.
For What Reason? – Launch the silo missile.
Personal Space – Punch or kick 100 times.
Laser Assist – Kill an enemy by knocking him into a laser door.
Excessive Stacking – Stack all 3 crates near the end of Chapter 11 (Single Player).
Hindenburger – Kill all penguins stationed on the zeppelin in Chapter 3 (Single Player).
Dirigibully – Kill all penguins stationed on the small zeppelin in Chapter 8 (Single Player).
Silver trophies
Rebellious Laborer – Find 20 Signs.
Own Pharmacy – Kill 6 helicopter penguins with their own missiles.
Hydrogen Run – Escape the large zeppelin with 40 seconds or more on the timer.
Too Many Too Soon – Kill 3 enemies with one grenade.
One Shot One Kill – Kill 10 enemies, each with one gunshot.
Big Blimpin’ – Kill all penguins stationed on the big zeppelin in Chapter 8 (Single Player).
Gold trophies
Mission Complete – Overthrow Putzki and liberate Albatropolis.
Dirty Half-Dozen – Complete the Cooperative game mode.
Hardboiled Orca – Kill 300 penguins or clones.
Revolutionary Fighter – Find all 45 Signs.
Bird Brained – Brainbug at least one penguin from each of the 7 penguin ranks, including Putzki.
Fear the Spur – Kill Brno with the knife.
Platinum trophy
Platinum Trophy – Earn all Bronze, Silver, and Gold trophies.