Requirements: level 15+

In this event, you open chests and receive guaranteed prizes from each of them.

There are 3 types of chests. Each type of chests requires a different number of keys and brings rewards on a random basis.

1. Standard chest. You need 9 keys to open a chest and you can open 45 standard chests in total. One of these 45 chests will bring you the main reward.
 
2. Enhanced chest. You need 18 keys to open a chest and you can open up to 30 enhanced chests. Enhanced chests contain fewer decor compared to standard chests. One of the 30 chests will bring you the main reward.  The chance to get the main reward is higher in enhanced chests than in standard chests. 
 
3. Super chest. You need 27 keys to open a chest and you can open up to 15 chests. Super chests contain no small decor and more buildings sold for seasonal currency and superbucks in the game shop compared to standard and enhanced chests. One of the 15 chests will bring you the main reward. The chance to get the main reward is higher in super chests than in standard chests.
 
It is up to you to decide what chest to open: standard, enhanced or super chest. 
You do not have to stick to one type of chests, you can open any chest you wish.
 

IMPORTANT! YOU CAN ONLY GET THE MAIN REWARD ONCE!

So, if you, for instance, opened a super chest and received the main reward, you will not be able to receive it again no matter how many standard chests and/or enhanced chests you open.
As soon as you receive the main reward in one of the chests, the possibility to obtain it in any further chest becomes blocked.
You can receive the main reward by opening any type of chests, but you can only get it once during the event.
 
 
The main reward is Gallaudet University, size 8x7, can be placed anywhere
Every 24 hours: 4200 coins, 1-3 candies/baubles, 1-3 energy

Each chest can be opened with Autumn Keys (9, 18, or 27)
There are 3 ways to get the Keys:

1. Completing quests
Key quests will appear one after the other in the menu on the left side
 

Treasure Hunting I
Ask friends for 5 repair kits  
Collect 9 reinforcements (Cargo Port)
Collect 7 screw wrenches (in friends' cities) 

Treasure Hunting II
Collect 8 pumps (Water Tower, Upgraded Water Tower)
Collect 21 jugs (Bakery, Upgraded Bakery)
Collect 16 valves (Premium Cottage)

Treasure Hunting III
Collect 6 books (School, Valley School)
Collect 17 maps of the stars (Stationery Shop, Upgraded Stationery Shop)
Collect 7 dandelions (in friends' cities) 

 
2. Collect profits from certain buildings:
Central Station: 1 key every 24 hours
Museum of Paleontology: 1 key every 8 hours
Hockey Hall of Fame: 2-3 keys every 24 hours
Hastings Buildings: 2-3 keys every 24 hours
Hauptwache in Frankfurt am Main: 2-3 keys every 24 hours
 
3. Purchasing keys from a special offer
 
Unique offer: Hastings Buildings, size 8x5, can be placed anywhere
Every 24 hours: 4000 coins, 1-4 candies/baubles, 1-4 energy, 2-3 keys during the promotion