The Gunmetal V3 is a highly sophisticated addition to the advanced collection, complete with a "stamatic" labyrinth that will take you on an incredible adventure! Your mission as the solver is to crack the Gunmetal's inner enigma using patience, logic, and dexterity. It takes an average of 40 - 60 hours to unlock and requires a unique approach from the solver.
 
Throughout the journey, Gunmetal will push you to your limits, and it is not to be missed. If you truly want to improve your experience, try Indigo or Copper before Gunmetal.