Heidegger Gesamtausgabe (citation is GA or HGA) is the term for the collected writings of German philosopher Martin Heidegger (1889-1976), published by Vittorio Klostermann.^{: ix–xiii}

The Gesamtausgabe was begun during Martin Heidegger's lifetime. First publication was GA 24 in the year 1975.

Martin Heidegger defined the order of publication. His written Motto done a few months before his death as "Ways -- not works." (Wege — nicht Werke). GA 1:437.

“ein Unterwegs im Wegfeld sich wandelnden Fragens der mehrdeutigen Seinsfrage” (GA 1:437). Lose translation: “a journey in the path of the changing questioning of the ambiguous question of Being".

Heidegger wrote this shortly before his death:

“The Gesamtausgabe is intended to guide people to take up the question, to ask it and, above all, to ask it in a more questioning way”.

(Die Gesamtausgabe soll dadurch anleiten, die Frage aufzunehmen, mitzufragen und vor allem dann fragender zu fragen). GA 1:437 in the afterwards.

Vittorio Klostermann’s overall edition plan for Martin Heidegger's in writings (in German) is online here.

The editors had to make do with manuscripts from Heidegger’s often handwritten manuscripts; but they had more leeway to include various student transcriptions in the published editions. They were given strict guidelines (see Franz-Karl Blust's Afterward in GA 22). These are generally noted in the Editor’s Afterwards (Nachwort des Herausgebers). It appears that the outline of the vast majority of the published writing were selected by Heidegger himself.  We finally got a special note in the afterward that Hermann Heidegger (1920-2020) and Friedrich-Wilhelm von Herrmann (1934-2022) had selected the published part known as #1-144 Denksplitter; these were not selected by Martin (See GA 91:771). Ergänzungen und Denksplitter (GA 91), was recently published in May of 2022.  Heidegger is “prepare guidelines” in a 1974 letter to Hannah Arendt (#162).  

Index of the all of the GA titles in alphabetical order in German from Klostermann is online here.

Vittorio Klostermann’s editions for Martin Heidegger's collected writings the HGA prospectus 2021 in .pdf format is online here.

Vittorio Klostermann’s corrigenda for some of the GA volumes is online here.

A contents list with details of all English translations of Martin Heidegger (including those currently in preparation) is available.

A new (2022) database application (GA-App) connecting Heidegger's teaching, lectures, and publications is online here.

Martin Heidegger Archives. Online: Deutsches Literaturarchiv Marbach, in the town of Marbach am Neckar, Germany. Also known as: DLA - German Literature Archive.

Most of Martin Heidegger’s manuscripts are in the DLA’s collection. Search for Heidegger in their Manuscript Collections is online here.

Heidegger had planned to write a lengthy introduction to his collected writings (Gesamtausgabe). He called his last project: Legacy of the Being Question (Vermächtnis der Seinsfrage). The date on this project is between 1973-1975; and it was not completed because of health reasons (Martin died May 26, 1976 at age 86). (See editor’s notes to »Kehre?« »Sagen der Kehre«). So far there are three documents that have been published as part of his project. The Heidegger’s archive at DLA the general Accession number is HS.2006.0021.00003. Note there is a title (Vermächtnis der Seinsfrage) of a poem in GA 81:349.

There may be more parts to be published in the future.

1). Heidegger, M. (2011-12). Auszüge zur Phänomenologie aus dem Manuskript "Vermächtnis der Seinsfrage", Jahresgabe der Martin-Heidegger-Gesellschaft. 106 pages. Excerpts on phenomenology from the manuscript “Legacy of Being Question”.

2). Heidegger, M. (2007). »Kehre?« »Sagen der Kehre«. Jahresgabe der Martin-Heidegger-Gesellschaft. 13 pages. The “turning?” Saying the Turning.

3). Heidegger, M. (2018). Das Wegfeld des Denkens. Jahresgabe der Martin-Heidegger-Gesellschaft. Editors Dietmar Koch, Klaus Neugebauer. The way field of thinking [or maybe The Wayfield of thought].

Publication status of the remains volumes:

GA 72. Die Stege des Anfangs (1944). Editor Mark Michalsk. Forthcoming after 2023.

[Note: the editor has started to review which manuscripts to be included in GA 72. Sept 2022].

GA 92. Ausgewählte Briefe I. ed. Mark Michalsk. Forthcoming.

GA 93. Ausgewählte Briefe II. ed. Mark Michalsk. Forthcoming.

Note: 2023 January 7, current published Gesamtausgabe (GA) page count total is 37,736.

The Gesamtausgabe is divided into four series:

I. Published writings, 1910–1976

II. Lecture courses, 1919–1944

• Marburg lecture courses, 1923–1928
• Freiburg lecture courses, 1928–1944
• Early Freiburg lecture courses, 1919–1923

III. Unpublished material, lectures, and notes

IV. Notes and records