TL:DR I watched this having never played the games but was on the fence about starting them. I am now playing the games. Its basically like the dead pool of anime with an insane amount of references to anime and video games. This is how a short anime that acts as an advertisement for your light novel/manga/game series should be. It is self contained story that had a beginning AND an end! Giving you a feel for the world and characters of the Neptunia universe. The voice actors for the games seem to be largely the same as for the anime which is a nice touch. Iwould recommend this even if you had no intention of playing the games