PowerWash Simulator's new patch includes Challenge Mode, more to wash - Polygon

PowerWash Simulator’s newest patch improves many quality of life issues, but also adds a new Challenge Mode. Players can see how quickly they can clean, as well as how little water they can use. There are new things to clean too, including a helicopter and a treehouse.

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PowerWash Simulator Receives New Challenge Mode

Challenge Mode, PowerWash Simulator Wiki

Challenge Mode, PowerWash Simulator Wiki

Challenge Mode and Soap Rework Spotlight - PowerWash Simulator Dev VLOG