Orchestral:
* "Einstimmungen" (1965): This is considered Lachenmann's breakthrough work. It is a piece for orchestra that explores the possibilities of microtones and non-traditional orchestral sounds.
* "Sechs kleine Klavierstücke" (1965-66): Six short piano pieces that were initially written as "Improvisations" and later notated.
* "Ausklang" (1967-68): A piece for orchestra with a very specific and minimalist style.
* "Das Mädchen mit den Schwefelhölzern" (1972-76): A large-scale orchestral work that is inspired by the story of "The Little Match Girl."
* "Grosse Fuge" (1976-80): An orchestral piece that is based on the fugue from Beethoven's String Quartet in C-sharp minor, Op. 131.
* "Mädchen mit den Schwefelhölzern" (1976-80): Another large-scale orchestral work, inspired by the story "The Little Match Girl."
* "Tanzsuite mit Deutschlandlied" (1994-95): A complex and challenging orchestral work that uses the German national anthem as its basis.
* "Conferencias I" (1999-2000): This is a piece for orchestra and a speaker and includes fragments of spoken text.
* "Conferencias II" (2000-02): Another piece for orchestra and speaker that uses fragments of spoken text.
* "Le soleil" (2010-11): A piece for 6 percussionists and a soprano.
Chamber Music:
* "Music for 18 Musicians" (1971-73): A piece for a large chamber ensemble that explores the possibilities of instrumental timbre and dynamics.
* "Trois mouvements pour violoncelle et piano" (1976): A piece for cello and piano that is characterized by its intense and expressive nature.
* "Mouvement" (1976): A short piece for solo cello that is often performed as an encore.
* "Laßt uns tanzen" (1990): A piece for five instrumentalists that is characterized by its rhythmic complexity and playful nature.
* "Moments Musicaux" (2007): A piece for solo piano.
Vocal:
* "Allemande" (1984-85): A piece for voice and ensemble that explores the possibilities of vocal timbre and articulation.
* "Dialoghi" (1984-85): A piece for voice and piano that is characterized by its intimate and expressive nature.
* "Gesang der Jünglinge" (1996-97): A piece for solo voice and a large ensemble that is based on the story of the three young men who were thrown into a fiery furnace in the Book of Daniel.
* "Sechs Lieder" (1999): A cycle of six songs for voice and piano.
* "Todesfuge" (2004): A piece for soprano, clarinet, and piano, based on the text of Paul Celan's "Todesfuge."
Other:
* "Eine kleine Nachtmusik" (1979): A re-imagining of Mozart's famous piece.
* "Le soleil" (2010-11): A piece for 6 percussionists and a soprano.
This is not an exhaustive list, but it gives you a good overview of the types of works that Hans Lachenmann has written. He is considered one of the most important composers of his generation and his work continues to be studied and performed by musicians around the world.
It's important to note that Lachenmann's music is often considered challenging and difficult to access. It is often characterized by its use of unusual sounds, unconventional rhythms, and complex harmonies. However, his music can also be very beautiful and rewarding for those who are willing to listen to it with an open mind.