Home >Mobile Game Tutorial >Mobile Game Guide >The Mystery of Time Travel: A Strategy to Unlock the Second Level of the History of the Third Gear in 'Back to the Future: 1999'
In the game "Back to the Future: 1999", you need to unlock the Abandoned Son of Alefkum to clear the history of the third gear tooth. The first two levels are very difficult and players need to collect treasure chests and solve puzzles to get rewards. In addition, you can also collect items in the map space to get additional rewards. The following is the guide for the second level of the third door gear in "Back to the Future: 1999". Please take a look!
In the second level, collect secret meetings first
Note: The light source needs to be recycled after use
Step on the pressure plate to unlock the door on the right
Collect the dust of history
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