Adventure Labs can be accessed from both the main lobby access point as well as inside slot machines access point.
 
 
Clicking on the Cell icon which represents the Adventure Labs takes you inside the feature view.
 

WHAT ARE MACHINES AND HOW MANY CAN BE UNLOCKED?

These incredible Machines are part of the Adventure Labs and help you to earn exciting Benefits. There are a total of 5 machines that you can unlock and each machine can be upgraded to a maximum level 4.