Trailmakers is a frequent inclusion in Humble Bundles. You can often get it along with 7–10 other games for a very small donation. Fanatical: Keep an eye on their "Build Your Own Bundle" deals. ⚠️ A Note on Safety Avoid any website that asks for your Steam password
confirm that "Free Steam key generators" do not exist and are typically scams designed to steal account data. Safety Tip: Trailmakers Steam Key Free
Key generators do not have access to Valve's secure servers. Trailmakers is a frequent inclusion in Humble Bundles