The American forums have a list of voucher codes for the 20th Anniversary event, but we don't appear to have one here (I could be wrong)...
The American list is here, but most of their codes only work on the American .net servers
Information about Codes
Codes are NOT case-sensitive - they should work in upper- or lower-case.
To enter the code, go to the game homepage, and click the 'Voucher' button on the menu. You can then enter the code into the box at the bottom of the page. You will be told if a code is invalid (or if you've already used it) before you click the 'Submit' button.
The event codes are usually hidden on the TSO Homepage, Facebook, Twitter or Forums
Colour Codes RED: Code has now expired, and can no longer be used GREEN: Code is currently valid
Event Adventure Codes
Two 'adventure' codes are available. These are supplied only as a bug workaround. If you cannot complete an adventure quest, or you have accidentally cancelled the adventure, but the quest is still active, then you can use these codes to give you a 'spare' adventure. It is recommended that you only use these codes if you really need to:
Old Ruins: 382-6c4d-f2a4 (from 2nd July 2013)
The Shaman: c3c-2da4-9e94 (from 2nd July 2013)
Event Codes
There will be 20 codes for the Anniversary Event. These are rumoured to be one per day, except at weekends, but this is not confirmed. Each code is valid for about 36 hours from the moment it is made available. Check back here every day to find the new code.
NOTE: Expired codes are now hidden in this spoiler tag. Valid codes are below.
Spoiler
1st Code: 647-AFFD-3AF4
Provides 500 gold ore deposit & 20 settlers
Code was supplied on the Homepage, in the news section. Had to hover over the image to view the code.
2nd Code: 8a6-a392-dda4
Provides 100 Tools & 100 Hardwood planks
Released on Friday 28th June 2013
Code was supplied on Facebook, with the last digit missing
3rd Code: 6b4-f69b-37b4
Provides 1 Stadium Snack
Released on Monday 1st July 2013
Code was supplied on the Homepage, as an animation on the right side. Had to click on the guy blowing up a balloon 3 times.
4th Code: 6F3-C6E8-ABF4
Provides a Love Potion
Released at about 2:18pm on Tuesday 2nd July 2013 (Expires ~2:18am on Thursday)
Code was supplied on Facebook, hidden in a new cover image.
5th Code: 757-3DCA-C6C4
Provides 250 Brew
Released at about 11am on Wednesday 3rd July 2013 (Expires ~11pm on Thursday)
Code was supplied on Twitter, with the first letter missing
6th Code: c43-25d7-f324
Provides 2,000 coal deposit and a Cheese Sandwich
Message: The weekend is close! You need more coal for that epic barbecue you planned. Use this refill to get more coal from your mines and enjoy this lovely cheese sandwich after your hard work.
Released at about 9:52am on Thursday 4rd July 2013 (Expires ~9:52pm on Friday)
Code was supplied in a Forum Post, with the first and last letters missing
Bonus Code?: 72F-356A-4244
Provides Retro Forester, Farm, Mason, Woodcutter and Well skins as buffs which last for 5 hours
Message: Your Bonus is waiting! The following items will be credited to your account. You'll find them in the star menu. Enjoy!
Released on the evening of Thursday 4rd July 2013 (Expires on Saturday Morning?)
This code was sent to all players' email addresses advertising 20th anniversary celebrations.
7th Code: 5CC-3D89-A824
Provides 3 x Blue Flowers
Message: Your guests have arrived for the epic weekend party! Your friends are loving these festivities! You have received a present... some nice, blue flowers for your island.
Released at about 11:15am on Friday 5rd July 2013 (Expires ~11:15pm on Saturday)
Code was supplied in a clickable image (like the 3rd code), on the homepage of the site
8th Code: C72-2C4E-9D54
Provides an Artesian Well (Lv 4)
Message: The sun is shining. Here is a nice little refreshment for your guests.
Released at about 2:18pm on Monday 8rd July 2013 (Expires ~2:18am on Wednesday)
Code was supplied in an image, posted on the twitter feed.
9th Code: 37F-54A2-E544
Provides an 50 Simple Paper and 50 Nibs
Message: You received a lot of birthday cards and have decided to reply to them all! Here is the material you need.
Released at about lunchtime on Tuesday 9rd July 2013 (Expires about midnight on Wednesday/Thursday)
Code was supplied in a post on the homepage of the site. The message said:
Quote:
We interrupt your scheduled programming to bring -- something is interfering with the ...
Provides a Red Flying Settler buff
Message: And enjoy some free time in the sun and enjoy a delicious cold drink!
Released at about 10:12am on Wednesday 10th July 2013 (Expires about 10:12pm on Thursday)
Code was supplied in a clickable image (like the 3rd code), on the homepage of the site
11th Code: 294-68DC-FCD4
Provides 50 Granite
Message: To upgrade the buildings on your island, your friends give you some granite.
Released at about 9:02am on Thursday 11th July 2013 (Expires about 9:02pm on Friday)
Code was supplied in a forum post, as a cryptic message in morse code and binary:
Provides 250 Horses
Message: This is amazing! 250 horses for the parade! Your guests are loving it!
Released at about 1:50pm on Friday 12th July 2013 (Expires about 1:50am on Sunday)
Code was supplied in a Facebook image post, containing the following Base64-encoded text, which could be translated on the binary translation site above, or this site
Quote:
RTg2LTU3OTMtQjgyNA==
13th Code: 5C2-CE2D-7344
Provides 50 Gold Coins
Message: Lucky you! You receive 50 coins!
Released at about 2:05pm on Monday 15th July 2013 (Expires about 2:05am on Wednesday)
Code was supplied on the Homepage, with the following text:
Quote:
Dear Settlers,
A treasure trove for you today: 五C二-CE二D-七三四四!
Can you figure out the code of the day?
Happy Settling,
BB_Alpaca
14th Code: CA6-5CCA-6B34
Provides +500 Copper Ore deposit, and a Packed Wheatfield (Lv 4)
Message: A friend of yours owns a couple of copper mines. He has a special item for you.
Released at about 9:05am on Tuesday 16th July 2013 (Expires about 9:05pm on Wednesday)
Code was supplied in a tweet on the official Twitter Page, with the following text:
Quote:
%43%41%36%2D%35%43%43%41%2D%36%42%33%34 -- can you crack today's code?
Easiest way to translate the code is to type a random web address into your browser, and simply paste the code on the end, for example, type the following into your browser's URL bar: http://google.com/%43%41%36%2D%35%43%43%41%2D%36%42%33%34
and it should instantly translate it into: http://google.com/CA6-5CCA-6B34
15th Code: CAF-3592-76A4
Provides a Piero's Bowl of Pasta buff (3x output for 8 hours)
Message: Our beloved Settler Piero has shared a plate of his his famous pasta with you.
Released at about 9:05am on Wednesday 17th July 2013 (Expires about 9:05pm on Thursday)
Code is clearly visible at the bottom of a new Facebook Profile Image
16th Code: AD5-7C2E-34E4
Provides a Roasted Duck buff (3x output for 4 hours) and +1,000 Meat Deposit
Message: Nothing beats this! More food for all the guests plus a nice little refill.
Released at about 12:49pm on Thursday 18th July 2013 (Expires about 12:49am on Saturday)
Code is provided in a QR Code Image in a forum post
17th Code: 2F2-95DE-CC44
Provides a Chocolate Bunny buff (2x Provision House output for 12 hours)
Message: Chocolate for dessert! Speed up your provision house to cater for your guests.
Released at about 10:30am on Friday 19th July 2013 (Expires about 10:30pm on Saturday)
Code was supplied in a clickable image (like the 3rd code), on the homepage of the site
18th Code: D34-7565-A6E4
Provides 2x Mother Tree Ritual buffs (3x output for 20 hours)
Message: You received a mysterious item from an ancient culture, it would seem it can be used to speed up your production..
Released early on Sunday 21st July 2013 (Expiry is probably Tuesday)
Code was supplied in a clickable image (like the 3rd code), on the homepage of the site