Video games that require an online server to work, need someone to host a server and rewrite the code to support old video games that the video game maker no longer supports. The fact that a video game maker can cease to support a video game by taking down the servers is scary. They can force owners of the video game to buy a new version for 2015 by taking down the servers for the 2014 version.
I used to have Battlefield 1942 and Vietnam for my son, and those servers were taken down. So the games are basically unplayable now.