Here is the full list of all 30 HuGe achievements.
Complete level 15
Find the secret at level 15
Complete level 14
Find the secret at level 14
Complete level 13
Find the secret at level 13
Complete level 12
Find the secret at level 12
Complete level 11
Find the secret at level 11
Complete level 10
Find the secret at level 10
Complete level 9
Find the secret at level 9
Complete level 7
Find the secret at level 8
Find the secret at level 7
Complete level 6
Find the secret at level 6
Find the secret at level 5
Complete level 5
Complete level 4
Find the secret at level 4
Complete level 3
Find the secret at level 3
Complete level 2
Find the secret at level 2
Complete level 1
Find the secret at level 1