[2021] [PC] [Crash/Freeze]When I hit play nothing happens (steam)

Hello there! I'm terribly sorry to hear that you haven't been able to play For Honor. Thank you for letting me know everything you have tried on your own to remedy this! I would recommend performing a clean boot at this time. That process will check for and identify any programs or applications that could potentially be interfering with the game. Afterward, please upload your MSinfo file in a case at support.ubi.com. From there, our technical support team will certainly be able to provide additional efficient, specialized suggestions. You can let me know your case reference number once it has been generated!