redownload it again, or use the steam key from ur purchase
for the download, do i need a steam key or can i skip it and download the file?
Also when there's a new update from the Among Us, will you have to pay again to update it or will Among Us automatically update?
do you really need a steam key to download the file or you can just skip and download the file? What I mean is that do you need steam to download it or it's optional and you don't need steam just like Baldi's Basics?