WHERE DO THEY COME FROM
ARKS HQ rewards operatives who perform exceptionally well, so one way to have a chance at Bonus Keys is to clear Recommended Quests at A Rank or better. There’s a reason ARKS HQ wants you to do these quests, so it behooves them to reward you for it.
WHERE DO THEY GO
Bonus Keys are consumed upon the start of the quest. If you disconnect from the server or abandon the quest, the Key will not be returned, so make sure you’re ready.
TIMING IS EVERYTHING
The goal of Bonus Quests is to take your enemies down quickly. This will help you earn the largest amount of EXP, Meseta, and items. Give this goal, these Bonus Quests will have Time limits of usually 10 minutes (some are 4 minutes). There are no level restrictions, so you can jump into them right away. However, these must be undertaken as solo ventures, so no Alliance members or Partner characters.
A great variety of items can be found in these quests, besides weapons and units with a tendency to be on the rarer side. Such items can include crafting materials such as minerals and jewels from various planets. Some Arks have even reported receiving STAR GEMS and ASTRACITE after completion of these quests. Astracite, of course, can be exchanged with Astracite Exchanger Nautbraugher on the second floor of the Shopping Plaza.