The developers often release a "Prologue" or demo version. While limited (you can only complete the first few contracts), it is a 100% free, legal download directly from Steam. Search for "Construction Simulator 2022 Prologue."

Notes on "free download" for PC

: You can purchase various editions (Standard, Gold, or Titanium) directly from the Construction Simulator official site Free Alternatives and Trials

Often features seasonal sales where you can snag the game at a discount.