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).
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).
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 - Earn all Bronze, Silver, and Gold trophies.