You can often find it at a discount on the Construction Simulator 2 Steam page.

Instead of looking for a pirated version, it's safer to grab the official game. is available on major platforms, often for a very reasonable price:

Your goal is to found your own construction company and take on increasingly complex projects—everything from repairing crumbling roads to building massive bridges and towering skyscrapers.

You begin in the town of Desert Springs with just a few basic machines and a small yard.