Early concept artwork of Metropolis Zone.
An alternate coloration of the previous image.
Early concept artwork of the Metropolis Zone.
Early concept artwork of the Metropolis Zone. Text refers to the Zone as "Sonic sweat shop."
Early concept of the Metropolis Zone. Windows can be seen.
Early concept art of the foreground for the Metropolis Zone.
Early concept of the background for the Metropolis Zone. Furnaces can be seen.
The unused diagonal elevators for the Metropolis Zone.
Concept of the diagonal elevators for the Metropolis Zone.
A list of obstacles slated the Metropolis Zone, including those unused.
Concept of various elements in the Metropolis design.
Concept of various elements in the Metropolis Zone. Drawn on STI letterhead.
Concept of various elements in the Metropolis Zone. Drawn on STI letterhead.
Concept of various elements in the Metropolis Zone.
Concept of various elements in the Metropolis Zone.
Concept of various elements in the Metropolis Zone.
Concept of the gears in the Metropolis Zone.
Concept of the gears in the Metropolis Zone.
Early Metropolis Zone Act 1 map. Has diagonally slanted rotating steel drums. Very different from final. Only two things seem very similar to final; the general starting area's position, and the downward ramp leading to the
Goal Plate area.
Early Metropolis Zone Act 2 map. Has giant
crushers. Very different from final. The only recognizable areas are the immediate starting area and an area with a half-loop leading to a ramp in the top-left.
Another Metropolis Zone Act 2 map.
Early Metropolis Zone Act 3 map. Has a diagonal elevator.
Early Metropolis Zone Act 3 map. Features a horizontal spike obstacle, similar to the ones removed from
Marble Zone.
Early Metropolis Zone Act 3 map.