While the original game isn't free, you can download a Free Demo of PC Building Simulator 2 on Epic Games to play the first 5 levels of Career Mode. Basic Gameplay Tips
You can buy the base game on Steam for approximately $19.99. PC Building Simulator Free Download (v1.10.5)
Start small by diagnosing and fixing customer PCs to earn money and unlock better parts. While the original game isn't free, you can