Note: Some quests must be completed in a specific order, I suggest completing in the order as is shown below. Remember to collect the book after you finish them.
Heroes Never Die:
Just defeat all the enemies, but make sure to choose balanced party members. Still, it isn't too hard.
3 Stars of Destiny:
Push all Fairies in the carpets of their respective collors from left to right.
Lost Orb:
Click in the altar first, three orbs will appear. Push them and place them in their respective places according to their collors.
After that you have to find a orb in the Witch Coven, to find the coven go to the Swamp of Witches, choose the left gate and keep going until you find a dead end with the orb.
Dawn's Light:
Equip Gravitron with the Photo Bulb V1.6, talk to the girl and use Gravitron Cam Shot to pick a screen of the place. Make sure to collect the book from the bookshelf after you get out to complete Lord of Twilight
Deadly Sin:
Collect the money from the ground and talk to the ghost, you have commited a sin. Go to Eternal Eden and tell that you comitted the sin of greed. You'll complete Eternal Eden, go to Gates of Night and head to the north wall on the extreme left of the screen click and you'll be on Deadly Sin again, this time don't collect the money and talk to the ghost in the end.
Gates of Night:
Complete Deadly Sin before completing Gates of Night.
You'll have to fight all the animal kings that you fought in a row.
Eternal Eden:
Read Deadly Sin above.
Lord of Twilight:
Use the book Dawn's Light. Don't forget to talk with the vampire again to get the Jar of immortality
Curse of Immortality:
Do it with the Jar of immortality in the inventory.
Last Heroes:
Put the Last heroes in chronological order in the party. Put Marine, Jack, James and Salome in your party.
Grimoire Chronicles:
Talk to the witch behind the tree in the Swamp of Witches, you'll get Grimoire XII, bring it to Roy, the guy who asked you to fix the key, his house is in one of the trees in the world map close to Lorelei. Then bring the book back to the witch and she'll give you a dynamite.
Take me higher:
Jump using Air Sandals, when Marine can't jump high anymore, go to your inventory and use dynamite.
Bitter Truth:
Inflict Boredom in Marine, if the woman still persists, it means that you still have quests to do.
Treasure of Memories:
Do this one after complete all the others.