I'm not quite sure what you're looking for because your request for an about a free download of Among Us on PC could mean a couple of different things. Did you mean:
Could you please clarify which of these topics you'd like me to write about? I'm not quite sure what you're looking for
A or guide about the official ways to play the game on a computer? I'm not quite sure what you're looking for
An discussing the ethics and consequences of downloading games for free (piracy)? I'm not quite sure what you're looking for