This is the summary.
Be sure to complete the story for your occupation and home map (e.g. Force Archer and Green Despair). It will unlock the level of quest. For example, if you do not pass Level 20 Quest for Aura, the quest beyond level 20 will not show.
The Truth of the Research Group -- complete all 10
The Sage Tower -- do only first quest
- The Appointment of the 8th Sage
The Book of Apocalypse: Part 1 -- complete all 5
The Secret Organisation: Part 1 -- complete all 7
The Secret Organisation: Part 2 -- do only first 7
- The Beginning of Another Search
- The Cranky Alchemist
- Tesky's Conditions
- The Shady Wizards
- The Wizard's Laboratory Part 1
- Arionell, Immersed in Trouble
- The Wizard's Laboratory Part 2
The Book of Apocalypse: Part 2 -- complete all 5
The Book of Apocalypse: Part 3 -- complete all 10 (now get Port Lux)
The life will be easy until you want to choose the country, where you have to pass many quests again.

You have to choose country, in order to do the upgrade quest at level 110 to 170.
Hint: in some rooms in dungeon, do not skill all monsters. But running to the end of room and kill the key monster, the room will unlock.