Is there a possibility in Unity 3D to render a game in this way that before playing it you have to actually install the game 
like for example game use 910 MB space i want to render it in this way that it will be much smaller for example 290 MB and before playing it will ask you to install like a typical game :). And if its by Unity 3D or thanks to another program can you please correct me how to do it thank you very much.
You can do that by using your favorite install builder.
Unity does not package the standalone program for you but does neither restrict what you use. its just an exe with additional files, waiting for you to be packaged up
so it is possible good
But can you propose a good Install Builder ?
I am really knew to all that stuff some programs and tips would be great :).
The only one i found good is this
But its really expensive maybe for beginning something smaller and simpler ??
may be a bit overdressed, but best for customizing to your games visual style.
unfortunately win only
Thank you siggi-gross that is perfect one
I just need to learn how to change icon and change installer to make it look more like my game :).
And don’t Alfa and Beta game will be only on Windows so i don’t mind :).