AereA
28 Achievements
1,000
20-25h
Improvvisato
Complete all sidequests
100
3.52%
How to unlock the Improvvisato achievement in AereA - Definitive Guide
Forest 1 - kill 10 beetles
Forest 1 - retrieve 4 flower
Forest 1 - retrieve 5 fangs
Forest 2 - kill 12 Cicadas
Rock desert 1 - kill 6 hedgehog
Rock desert 1 - kill 12 vulture
Rock desert 1 - retrieve 3 poison
Rock desert 2 - kill 8 scorpion
Rock desert 2 - retrieve 3 poison
Temple ruin 1 - kill 16 gricks (unlocked 50% achievement)
Temple ruin 1 - retrieve 5 letter
Temple ruin 2 - kill 16 stirges
Swamp 1 - kill 20 vine horrors
Swamp 1 - kill 10 ooze
Swamp 1 - retrieve 5 herb
Swamp 2 - retrieve 1 firefly
Lava cave 1 - kill 15 bat
Lava cave 1 - kill 6 Magma Beasts
Lave cave 1 - retrieve 1 magnifying glass
Lava cave 2 - retrieve 6 papers
All of the sidequests in AereA will be given by the student NPC named Hubert in the music hall. None of them can be missed, and he will simply give you the next one in line as you complete them. If you do all the sidequests for all the areas you have unlocked, you'll need to progress the story and unlock a new area before he'll have any new quests to offer you.
The quests will complete as soon as you fulfill the requirements in the field, so there is no need to return to Hubert to turn them in - you get the rewards right then. However, make sure you go talk to him after completing each quest to get the next one he has. The last sidequest will take place in the lava world.