Hidden achievements masked with question marks?

I wanted to do something similar to the Completion List from the Yakuza games, but I have trouble having the hidden completion points actually stay hidden. Here’s a small example snippet:

  • Adventure
    • Travel 10km by foot
    • Travel 30km by foot
    • ???
    • ???
    • Use 5 recovery items
    • Use 15 recovery items
    • Use 30 recovery items
  • Battle
    • Defeat 50 enemies in Leopard Style
    • ???
    • ???
    • Learn 5 skills
    • Learn 15 skills
    • ???
  • Business
    • Buy 1 property in the Egg Isle area
    • Buy 3 properties in the Egg Isle area
    • ???
    • Defeat the Egg Isle Hermit
  • Intrigues
    • Complete 5 Intrigues
    • Complete 10 Intrigues
    • Complete 20 Intrigues
    • ???
    • ???
  • Entertainment
    • Earn a total of 1000 tags in Playbank
    • Earn a total of 3000 tags in Playbank
    • ???

Obviously, I’m using the Visustella Quest Plugin on that one.