Here is the full list of all 30 Rocketbirds: Hardboiled Chicken trophies - there are 17 bronze, 6 silver, 6 gold and 1 platinum.
Collect all trophies
Overthrow Putzki and liberate Albatropolis
Complete the Cooperative game mode
Kill 100 penguins or clones (Single Player)
Kill 300 penguins or clones (Single Player)
Find 3 Signs
Find 20 Signs
Find all 45 Signs
Juggle an enemy for 10 seconds (Single Player)
Kill a helicopter penguin with his own missile
Kill 6 helicopter penguins with their own missiles
Escape the large zeppelin with 40 seconds or more on the timer
Kill 30 Penguins as they step out of a door (Single Player)
Brainbug 30 enemies
Brainbug the penguin above the star in Chapter 6 (Single Player)
Kill 20 enemies while brainbugging
Brainbug at least one penguin from each of the 7 penguin ranks, including Putzki in a single playthrough
Kill Mega-Brno in Hardboiled mode
Kill 2 enemies with one grenade
Kill 3 enemies with one grenade
Kill 6 enemies with the bazooka
Find all four episodes of Putzki on TV in a single playthrough
Launch the silo missile
Kill yourself as an Elite Penguin on Palace TV in Chapter 13
Kill 10 enemies, each with one gunshot (Single Player)
Kill an enemy by knocking him into a laser door (Single Player)
Stack all 3 crates near the end of Chapter 11 (Single Player)
Kill all penguins stationed on the zeppelin in Chapter 3 (Single Player)
Kill all penguins stationed on the small zeppelin in Chapter 8 (Single Player)
Kill all penguins stationed on the big zeppelin in Chapter 8 (Single Player)