There is not many codes in Yahoo! Towers. Go see the codes for yourself. Sit down at a table for about 20 minutes and watch the demo. A code will appear. Seeing all of the codes takes time. You must not leave the table or you will have to start over. When a code pops up, take a screenshot! I use Ctrl + Print Scrn and open the image in Paint.

Here are the 4 codes

1. REMOVE EXACTLY 50 TOTAL BLOCKS
SPEED DROP POWER BLOCK
2. REMOVE EXACTLY 100 TOTAL BLOCKS
REMOVE POWERS POWER BLOCK
3. REMOVE EXACTLY 150 TOTAL BLOCKS
REMOVE STONES POWER BLOCK
4. WIN 25 GAMES, ABOUT TWO HOURS
BECOME A YAHOO! TOWERS HERO

 

The first three codes simply tell you how to get the special diamond cell power blocks, and the second line on each code, describes which special cell you will receive after removing the amount of blocks specified.

The 4th code tells you how to achieve the 5th code. The 5th code will appear immediately after your 25th win (within a 2 hour limit) in the chat box area. The 5th code is the hero code!