Well, since I actually work in this field, I can tell ya that Amazon is pretty much starting to subtly require all books available through them to be available in ebook format in some way. So there's a big conversion drive going on amongst the small publishers to comply. (The big publishers have been doing it automatically for a while.) As far as specific titles, you seem to be in very good company. Here are 350+ other Kindle books available from Amazon about videogames/video games:
Amazon "videogame" Kindle books (only the first 5 - the others are blog subscriptions)
Amazon "video game" Kindle books - Approximately 350+ results.