Technicity is a first-person city building game where you can also design your own construction blocks and items to create really unique buildings.
Use cranes to speed up construction, terraform the open world, build roads and use vehicles to travel to different cities that you or your friends create in solo or coop mode.
The open world is huge and can be filled with many big cities. An existing road network with thousands of km's lets you reach every part of the 384 km2 map. Build your own roads and they'll be integrated into the navigation system.
Terraform the world with steamrollers and bulldozers - you can even create or remove entire mountains!