Venting Achievement in I Dig It
Plug 10 geothermal vents in the Oceanic exedition.
How to unlock Venting
This achievement needs to be done on the Oceanic level. Vents are identified as a hole in the ground where currents of bubbles originate. This achievement can easily be obtained through a regular expedition completion, but can also be grinded by selecting the Oceanic level on quick play, saving at home base after buying a plug and using it on the vent right below base and repeating the level.