We have received various reports from our users who cannot launch Killing Floor because of “Steam_api.dll is missing from your computer. Try reinstall the program to fix this problem” error. Some users have tried to reinstall the game, DirectX and other Windows redistributables, but nothing has helped. The Steam_api.dll is missing error usually occurs after they try to launch the game and then KillingFloor.exe stops responding and the error message appears on the screen. The problem with Steam_api.dll is the problem with the corrupted library in your system. You might try to reinstall the Steam from the official website, but there is another, easier way to fix Steam_api.dll is missing problem.
So, if you don’t want to reinstall Steam client or you simply don’t want to bother with that, you can simply download and install Steam_api.dll library from here: https://fix4dll.com/steam_api_dll. This should fix your Steam_api.dll is missing problem in Killing Floor. The installation instruction is provided on the website and it is simply as copy and paste. Also, you will have to register the library in the system by executing few commands in the command line. The instruction on the website will help you to perform that operation correctly. Once you’ve done that, simply reboot your system and enjoy playing Killing Floor.
If you managed to solve the Steam_api.dll is missing error on your pc, feel free to like and share this guide to help others.