Friendly Transit
Carry the other cooperative player for 500 meters in the same chapter without dying
10/27/2012
3:35:44 PM
Rare 10.7%
Hindenburger
Kill all penguins stationed on the zeppelin in Chapter 3 (Single Player)
10/27/2012
2:18:58 PM
Rare 21.9%
Hydrogen Run
Escape the large zeppelin with 40 seconds or more on the timer
10/27/2012
1:53:02 PM
Rare 10.5%
High Treason
Brainbug the penguin above the star in Chapter 6 (Single Player)
10/27/2012
1:08:39 PM
Rare 12.1%
Bird Brained
Brainbug at least one penguin from each of the 7 penguin ranks, including Putzki
10/26/2012
11:40:22 AM
Very Rare 9.8%
Excessive Stacking
Stack all 3 crates near the end of Chapter 11 (Single Player)
10/23/2012
3:51:37 PM
Rare 16.2%
Big Blimpin'
Kill all penguins stationed on the big zeppelin in Chapter 8 (Single Player)
10/22/2012
3:37:50 PM
Rare 14.2%