Age of Steam is a unlockable tech tree that delivers steampunk themed buildings to the player's city.
The Age of Steam unlocks at level 9.
Along with the buildings certain toons will roam the streets after their corresponding building is built.
In general the buildings are way more expensive then the normal buildings but they provide a better boost also.
After unocking the technologies in the Age of Steam tech tree, the following buildings will be available for building: