Here is the full list of all 45 Happy Feet Two: The Video Game achievements worth 1,000 gamerscore.
Level up all songs
Complete Level 28 without getting hurt
Complete Emperor Land
Complete the last level of a Land with full health
Complete an entire game in Co-Op
Complete the game
Defeat every Boss without making a mistake
Bring 200 friends to the Doomberg
Win every Race
Complete Elephant Seal Land
Smash five Stone Columns
Unlock all songs
Scare 20 Skua Birds
Activate 20 moving platforms
Complete Adelie Land
Cross 50 Ice Rails
Convert 3 Penguins at the same time
Activate all the Vibes in one Level
Move five Ice Slide Blocks
Collect 2000 Black Notes
Collect the most notes in a Bonus Level in co-op
Smash three Ice Boulders at the same time
Wake up five Sleepy Penguins
Complete a Race without hitting anything
Revisit a previously played level
Win your first Race
Hit every stunt hoop in a Race
Complete three stunt hoops in a single Race
Jump off three stunt ramps in a Race
Fill the boost bar in a Race
Collect 200 black notes in one level
Beat a Boss without making a mistake in co-op
Beat a Boss without making a mistake
Complete five levels with every penguin in the level
Clap 108 times
Perfectly perform a Dance Combo and a Stomp Combo in quick succession
Stay on the beat for 20 beats
Switch control between characters
Destroy 10 objects during Disco Fish mode
Collect a Disco Fish
Collect 100 Black Music Notes
Complete a level with full health
Complete a level
Assemble a group of 5 penguins
Assemble a group of 3 penguins