The first multi-year waiver in 2012 was for "consoles, distribution platforms and software," but the second one-year waiver was defined more narrowly for video game software only, and will expire on December 31st of this year. According to the FCC document itself, the Electronic Software Association (ESA) asked for the extension on behalf of its member developers. The FCC notes that while advocacy groups and commenters on the matter want accessibility in video game software, no one has actively opposed the extension itself.
The FCC says that it decided to grant the waiver for three reasons. One, video games are sufficiently similar in this regard to communications that they can be considered as a class unto themselves. Two, games are primarily made for the purpose of gameplay itself, not communications. Finally, the FCC allows that extending the waiver so that developers can find ways to make them more accessible is in the public interest. In addition, the FCC realizes that accessibility is already becoming ubiquitous, like with the text-to-speech capabilities built into Microsoft's development kit and the accessibility features inherent in Nintendo's smartphone companion app for Splatoon.