Sometimes you want to backup the app you are installing in your android device, or maybe a game cant be installed bcoz it requires higher hardware configuration than your phone but you are sure your phone can run the game, or maybe you dont have internet in your android and cant setup a wifi too. This situations you can use this method to download apps directly from playstore to your pc.
Install Google Chrome.
Download and install the APK Downloader Chrome Extension.
Open your Google Chrome -> Option -> Tools -> Open Extensions page, then drag the downloaded file into that middle of the page.
Open dial pad, call *#*#8255#*#* ( 8255=TALK ). If it opens “GTalk Service Monitor”, find lines that begin with JID and Device ID . Your email is JID , and your device id is a string that after android- prefix
For example: if it shows android-1234567890abcdef , then your device ID is 1234567890abcdef
Now Enter email and device ID on Options page of the Extension, you also have to write your gmail password(which sucks but must have to be done)
Now you can download apps from playstore easily, just click the download button beside the bookmark button.