While it is true that more and better scanning should be done for uploaded files, it is also true, that I recognised lots of scams almost immediatly here. Real game sites just look different in the lower part after the fake description. And they do not get promoted by comments in other games with look here, free game. And they are not polished looking with only a few hours/days in age on the site. Or published by an account that was dormant for a year or is new.
Did the malware ask for admin rights? I am just curious, because that would be the final straw for any supposed game that I downloaded. Sadly Microsoft did a very, very, very bad design decision to make installing user level programs (like games) in the Progams Folder an action that requires admin rights, training users to just click yes, when installing stuff. (Though, practically all games I downloaded here are not installed in the classical way, but only extracted and run from wherever.)