Hey there, Thank you for getting in touch. We understand you're unable to launch Nightfall. What you describe does sound strange. To rule out a temporary bug, you may wish to see if restarting the game and [url=https://help.steampowered.com/en/faqs/view/6AD7-820D-8BE5-E51F]Clearing the Download Cache[/url] helps to resolve this. If this issue affecting Nightfall persists beyond that suggestion, then please consider using your platform's share feature to record a videoclip of what you're experiencing. If you record such a clip, you can upload it to a site like Youtube, and share a link here. We'll then investigate.