This article may contain spoilers. Read at your own risk!
Pixelated World is the first world in Campaign introduced in the 4.0.0 update. It contains 9 stages. All the levels are situated in rather ordinary places with the exception of Area 52. All of them appear to be zombified or infected.
It appears to be a floating, grassy island with two waterfalls, some dirt and stone on the bottom, 3 flowers, several trees and a rocky mountain. It has 3 fence segments, a blue tower, a barn, Newbie's house, a church and a few buildings. It also has a tractor and a bulldozer.