Achievements are badges you get for accomplishing certain things. They are very common badges and due to this people decide not to wear them so often. This is except for the "True Habbo" badge as it shows how long you have played habbo.
Habbo has now catagorised the achievements into different sections.
Discontinued Achievements
New User Achievement
You get these badges by doing the quest for new users.youget this by doing shit on them LOL
Valentines Quests 2011
Valentines Friendship badges 2011 - Now unavaliable, you had to swap friendship badges with people once a day to get the top badge.
Valentines Quest badges 2011 - These were earnt for compleating a number of quests specially for the valentines period.