ウィークリーチャレンジ are skill-related Accomplishments that a player can complete once weekly upon reaching 採集 Level 10. A player can complete up to 3 Weekly Challenges for 採集 each week, awarding a total of 100採集スキルメダル.
Weekly Challenges are currently the same every week, and reset every 月曜日の協定世界時午前4時. Progress from uncompleted Challenges will carry over and count towards the following week.