State of Mind
34 Achievements
GOG
Wizard of Oz
John reached the big hall inside the Dome.
28.0%
How to unlock the Wizard of Oz achievement in State of Mind - Definitive Guide
Story related and cannot be missed.
When in the Dome with John, you’ll have to cross a small maze by calling Richard and using your bot to switch the doors and open up new paths. When you arrive at the center and cross the bridge, take the elevator and you’ll then unlock the trophy.