My experience with Linux is very limited other than my steam deck. For cracked games, if there is no Linux version available, I usually install them on my windows pc first, copy the games folder to the deck then add it to the library as a non steam game. After that you just specify the proton version in the games steam properties and it runs.
Ideally you would want native Linux versions. Those are few and far between but they do get released from time to time.