Videogames from content/blog/free-software-games.md aren't italicized.

A video game should be italicized, as it’s the name of a standalone, 
self-contained work — a work that is complete in and of itself, like a 
book or movie or painting.

 > The cite element represents the title of a work (e.g. a book, a 
paper, an essay, a poem, a score, a song, a script, a film, a TV show, a 
game, a sculpture, a painting, a theatre production, a play, an opera, a 
musical, an exhibition, a legal case report, a computer program, etc.).
                                                ^^^^^^^^^^^^^^^^

Wikipedia, and many other websites, do this (see 
https://en.wikipedia.org/wiki/The_Battle_for_Wesnoth).