Here is the full list of all 35 The Orb Chambers II achievements.
Cleared the 7th level on Normal
Cleared the 6th level on Normal
Cleared the 5th level on Normal
Cleared the 4th level on Normal
Use any skill for the first time
Cleared the 3rd level on Normal
Cleared the 2nd level on Normal
Blow up your first bomb
Cleared the 1st level on Normal
Use the skill house to refill your skills
Enter your very own house!
Cleared the 8th level on Normal
Cleared the 9th level on Normal
Cleared the 10th level on Normal
Cleared the 11th level on Normal
Cleared the 12th level on Normal
Cleared the 13th level on Normal
Cleared the 14th level on Normal
Cleared the 15th level on Normal
clear level 1 on hard
Clear level 2 on hard
Clear level 3 on hard
clear level 4 on hard
clear level 5 on hard
Clear level 6 on hard
Clear level 7 on hard
Clear level 8 on hard
Clear level 9 on hard
clear level 10 on hard
Clear level 11 on hard
Clear level 14 on hard
Die for the first time
die a total of 100 times
Find your original self
Find the secret item