Thank you. Sorry, I forgot to mention that I just installed it from the repos. As for the exec command, it is a bit confusing because there are more than just one. There is an exec command under every catagory. For example, there is a section called [Desktop Action BigPicture] that has an exec line Exec=steam steam://open/bigpicture. There are more than one section, and they all have an exec line. I tried the line you provided at the very end of the steam.desktop and steam-native.desktop and still got nothing. So not sure honestly