quest
Primarily used in role-playing games and fantasy contexts for a mission or task given to a character.
次のクエストを受注した。
I accepted the next quest.
このクエストをクリアすると、レアアイテム
I accepted a quest from a villager.
If you clear this quest, you can get a rare item.
ようやくこのクエストをクリアした。
I finally cleared this quest.
I decided to progress the main quest.
I tried taking on a difficult quest.
subquest; side quest
Borrowed from English 'quest', used in Japanese primarily in gaming and fantasy contexts.