Prior to Q3 2009, Compile Heart was conceptualising a new RPG project centred upon character designs by Tsunako, with the intention of collaborating with a partner company.

However, the partnership deal fell out, and as a result the project plans were redesigned and eventually became "Neptunia" close to the end of 2009 following the completion of Trinity Universe's development.

Following Compile Heart's collaboration with David Production to produce the Neptunia television animation series, the developers were able to change their approach to direction and script-writing based on their experience with the anime development staff, which resulted in the changes to the narrative found in the Re;Birth games on PlayStation Vita.

Another game, titled Hyperdimension Neptunia PP (神次元アイドル ネプテューヌPP, Kamijigen Aidoru Neputyūnu PP),[4] was released on June 20, 2013, for the PlayStation Vita in Japan and it was released in the west in June 2014 as Hyperdimension Neptunia: Producing Perfection, developed by Compile Heart, Idea Factory and Tamsoft.

During a streamed interview at Tokyo Game Show 2013, Idea Factory and Compile Heart announced that Hyperdimension Neptunia Re;Birth 2: Sisters Generation was under development.

It was later remade as Hyperdimension Neptunia Re; Birth 2: Sisters Generation which was initially released in 2014 for PlayStation Vita and Steam.

It received an enhanced version for the PlayStation Vita and Steam as Hyperdimension Neptunia Re;Birth 3: V Generation which was initially released in 2014.

The game received a remake, framed as a retelling of the True Ending route, in 2017 as Megadimension Neptunia VIIR which featured new cutscenes with VR support.

An online mobile card game for Android and iOS developed by Idea Factory and hosted by GREE starting from February 15, 2013.

A hack 'n' slash game with rhythm elements that tackles and parodies culture around social media, featuring various Vtubers.

The first game in the series not to receive an English dub due to the amount of guest Vtubers present.

A spin-off novel of the anime, titled Hyperdimension Neptunia TGS Hono no Futsukakan, was published by MF Bunko J and released May 25, 2013.

[31] Series composition and script writing are done by Shōgo Yasukawa and a musical score composed by Hiroaki Tsutsumi, Kenji Kaneko and Masaru Yokoyama.

Returning staff members include Masahiro Mukai as director, Hitomi Takechi as character designer, and Shōgo Yasukawa as scriptwriter, with animation by studio Okuruto Noboru.

[36][37] The anime television series adaptation received a mixed response, with praise for its original story and humor revolving around video game industry in-jokes, and criticism for its use of melodrama.

[39] The first, titled Hyperdimension Neptunia Sound Track CD, was released on August 19, 2010, and was bundled with a Japanese Limited Edition of the game.

[41] It was later repackaged with the western limited release on February 28, 2012, which featured 18 tracks and was titled Hyperdimension Neptunia mk2: Sounds of Gamindustri.

[42] The soundtrack for Hyperdimension Neptunia Victory was released on August 30, 2012, with the Japanese Limited Edition and contained 16 tracks.

[45] Its overseas release, MEGADIMENSION NEPTUNIA Official Soundtrack was included exclusively with the Limited Edition online, containing only 45 tracks over 2 discs.

[47] For each title in the Re;Birth series, the soundtracks were re-released following each game's initial release, usually with a few additional or missing tracks.

[48] Compile Heart and Idea Factory International later made the Re;Birth series available for the PC on the Steam platform, in which DLC included digital releases of the soundtrack for each game.

[49] The anime series also released singles for the opening and ending themes, alongside a drama CD and 7 special "Animation Processor" discs, which contained a variety of different audio media including songs, voice actor commentary, and drama episodes.

A compilation of the main vocal tracks from each game (including character songs) was released as a 5 disc series on August 27, 2014.