Gavindale: A quick question - how do I determine the file size of a game? Is there a way to tell how much hard drive space a game takes up? I hope this is not something obvious, otherwise I will be quite embarrassed!
I am not aware of any, unless maybe Galaxy provides that ... it certainly seems like it does after installing, but I don't use Galaxy to know if it says exactly how much space is required before installing. After installing of course, you can use Windows Explorer to give you the amount too, but I am guessing you want the size before installing.
The closest you can kind of get, without data from someone or something else, is the recommended required space, as shown in one of the screenshots provided. In reality, while not perfectly exact, that also takes into account what you need to play the game, for save files etc. That really should be your most important size concern. While installer file(s) size is important for downloading space, and extracted (installed) size is also important, none of that matters if you don't have the required space to play the game.
There are some databases you can check, that might be that 'something else' I mentioned.