They tell people not to buy it unless they want to support development and know what they ' re getting into . If you understand that , now you can get it a little cheaper . Putting it on sale doesn ' t conflict with that . It doesn ' t change those conditions . <| sep |> Realistically not a whole lot For example , I ' ve played Battlefield 1 for 40 hours and have used 1 . 4 GB but if you ' re running Windows 10 , it actually has a builtin data usage tracker . I ' m not sure how accurate this is as I ' ve only checked it once or twice and haven ' t done any research on it . To find it , just go to Settings Network Internet Data Usage . To get the best results just check it before you launch the game , and after you close it . Here ' s an example from my computer