IGG is very toxic website that has a history of adding various types of malware (both web and games), including cryptominers.
It's higher on that list, even though for some reason it only highlights the (barely coherent) silliness that it has DRM.

I'm not know the nosteam website, it's odd that they mention it on the list but it's not listed.

IGG /nosteam uploads presumably means that they are the sources of the games. I don't know a huge amount about game piracy, but it sounds like IGG / nosteam are not trustworthy.