In order to achieve the accomplishment Gem Hoarder, one needs to complete this specified stage with 25 gems. But I am unable to find this many!

Here I am with 22 gems at the final boss. And the boss does not drop any. So how do I got all 25 gems necessary?

1 Answer 1


You need to sell at the end a tower upgraded to black or two towers upgraded to purple. Besides money, towers at those levels give you gems too when sold.

Check this video:

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