How do you get a cheap but working video game

well, if you asked this I'm sure you have a working internet connection. You can get 100% working video games for free in torrents. All you gotta do is to download a torrent client and install it (eg. utorrent or bittorrent) and search for your respective game and download the corresponding torrent which has good ratio of seeds : peers and download it via your torrent client. hope this helps you :)