I was waiting for American Truck Simulator 2016 for so long. My father works as a truck driver and after watching the trailer he said that it looks very close to reality. So I bought this game on steam, downloaded and installed it, however I was unable to run it because of Steam_api64.dll is missing from your computer error. This system error popped up right after the installation. I tried to verify game cache but it said that everything is ok with the game files. Had to write to steam support and after few days they responded me that it is something wrong with my steam application. However, the reinstallation of steam didn’t help me to fix Steam_api64.dll is missing error and quite interesting that this error only pops up when I try to launch American Truck Simulator 2016. Anyway, I started to look for the solution on the Internet and quickly found one that worked for me.
The solution for Steam_api64.dll is missing or not found on your computer is quite easy. You just have to download Steam_api64.dll file from here: http://fix4dll.com/steam_api64_dll. After that, just simply install it into your system folder or into the steam root folder and reboot your computer. This have helped me to fix Steam_api64.dll is missing error in American Truck Simulator 2016 and I hope it will be useful for you too. Feel free to share this guide with your friends who have problems launching American Truck Simulator 2016.