List of works from Oxford Music Online (somehow I didn't know or remember that Kraanerg was written for the opening of the NAC and was premiered here!):
Orchestral:
Anastenaria: le sacrifice, orch (51 insts), 1953, sketch
Metastaseis, 1953–4; SWF SO, cond. H. Rosbaud, Donaueschingen, 16 Oct 1955
Pithoprakta, 1955–6; Bavarian RSO, cond. H. Scherchen, Munich, 8 March 1957
Achorripsis, 21 insts, 1956–7; Colón cond. Scherchen, Buenos Aires, 20 July 1958
Duel, 2 small orchs, 1959; Radio Hilversum PO, cond. D. Masson and F. Terby, Hilversum, 18 Oct 1971
Syrmos, 12 vn, 3 vc, 3 db, 1959; Ensemble Instrumental de Musique Contemporaine, cond. Simonović, Paris, 20 May 1969
Stratégie, 2 small orchs, 1959–62; Venice Festival Orchestra, cond. B. Maderna and C. Simonović, 25 April 1963
ST/48, 48 insts, 1959–62; Orchestre Philharmonique de l’ORTF, cond. L. Foss, Paris, 21 Oct 1968
Akrata, 16 wind, 1964–5; cond. Simonović, Paris, 1965
Terretektorh, 1966; Orchestre Philharmonique de l’ORTF, cond. Scherchen, Royan, 3 April 1966
Polytope, 4 orch groups, 1967; Ensemble Instrumental de Musique Contemporaine, cond. Simonović, Montreal, Expo 67, 1967
Nomos gamma, 1967–8; Orchestre Philharmonique de l’ORTF, cond. C. Bruck, Royan, 4 April 1969
Kraanerg (ballet), orch, tape, 1968; Ottawa, June 1969
Synaphaï, pf, orch, 1969; Pludermacher, cond. M. Tabachnik, Royan, 6 April 1971
Antikhthon (ballet), 1971; cond. Tabachnik, Bonn, Festival Xenakis, 21 Sept 1974
Eridanos, 8 brass, str orch, 1973; Ensemble Européen de Musique Contemporaine cond. Tabachnik, La Rochelle, 13 April 1973
Erikhthon, pf, orch, 1974; C. Helffer, Orchestre de l’ORTF, cond. Tabachnik, Paris, 21 May 1974
Noomena, 1974; Orchestre de Paris, cond. G. Solti, Paris, 16 Oct 1974
Empreintes, 1975; Netherlands Radio PO, cond. Tabachnik, La Rochelle, 29 June 1975
Jonchaies, 1977; Orchestre National de France, cond. Tabachnik, Paris, 21 Dec 1977
Aïs, amp Bar, perc, orch, 1980; S. Sakkas, Gualda, Bavarian RSO, cond. Tabachnik, Munich, 13 Feb 1981
Pour les baleines, str, 1982; Orchestre Colonne, cond. D. Masson, Orléans, 2 Dec 1983
Lichens, 1983; Liège PO, cond. Bartholomée, Liège 16 April 1984
Shaar, str, 1983; Jerusalem Sinfonietta, cond. J.- P. Izquierdo, Tel Aviv, 3 Feb 1983
Alax, 3 ens of 10 insts (fl, cl, 2 hn, trbn, hp, perc, vn, 2 vc), 1985; Ensemble Modern, Ensemble Köln, Gruppe Neue Musik Hanns Eisler, cond. E. Bour, Cologne, 15 Sept 1985
Horos, 1986; Japan PO, cond. H. Iwaki, Tokyo, 24 Oct 1986
Keqrops, pf, orch, 1986; R. Woodward, New York PO, cond. Z. Mehta, New York, 13 Nov 1986
Ata, 1987; SWF SO, cond. M. Gielen, Baden-Baden, 3 May 1988
Tracées, 1987; Orchestre National de Lille, cond. J.-C. Casadeus, Paris, 17 Sept 1987
Kyania, 1990; Montpellier PO, cond. Z. Peskó, Montpellier, 7 Dec 1990
Tuorakemsu, 1990; Shinsei Nippon Orchestra, cond. H. Iwaki, Tokyo, 9 Oct 1990
Dox-Orkh, vn, orch, 1991; Arditti, BBC SO, London, cond. A. Tamayo, Strasbourg, 6 Oct 1991
Krinòïdi, 1991; Orchestra Sinfonica dell’Emilia-Romagna ‘Arturo Toscanini’, cond. R. Encinar, Parma, May 1991
Roáï, 1991; Berlin RSO, cond. O. Henzold, Berlin, 24 March 1992
Troorkh, trbn, orch, 1991; C. Lindberg, Swedish RSO, cond. E.-P. Salonen, Stockholm, 26 March 1993
Mosaïques, 1993; Orchestre des Jeunes de la Méditerranée, cond. Tabachnik, Marseilles, 23 July 1993
Dämmerschein, 1993–4; Cologne RSO, cond. Peskó, Lisbon, 9 June 1994
Koïranoï 1994; NDR SO, cond. Peskó, Hamburg, 1 March 1996
Ioolkos, 1995; SWF SO, cond. K. Ryan, Donaueschingen, 20 Oct 1996
Voile, str, 1995; Munich Chamber Orchestra, cond. C. Poppen, Munich, 16 Nov 1995
Sea-Change, 1997; BBC SO, cond. A. Davis, London, 23 July 1997
O-Mega, perc solo, chbr orch, 1997; E. Glennie, London Sinfonietta, cond. M. Stenz, Huddersfield, 30 Nov 1997
Choral:
Zyia (folk), S, male vv (10 minimum), fl, pf, 1952; cond. R. Safir, Evreux, 5 April 1994
Anastenaria: procession aux eaux claires, SATB (30vv), male choir (15vv), orch (62 insts), 1953, sketch
Polla ta dhina (Sophocles: Antigone), children’s vv, wind, perc, 1962; cond. Scherchen, Stuttgart, 25 Oct 1962
Hiketides: les suppliates d’Eschyle, 50 female vv, 10 insts/orch, 1964; cond. Simonović, Paris, 1968
Oresteïa (incid music/concert work, Aeschylus), chorus, 12 insts, 1965–6; cond. Simonović, Ypsilanti, MI, 14 June 1966
Medea (incid music, Seneca), male vv, orch, 1967; cond. Masson, Paris, 29 March 1967
Nuits, 3 S, 3 A, 3 T, 3 B, 1967–8; cond. M. Couraud, Royan, 7 April 1968
Cendrées, chorus, orch, 1973–4; cond. Tabachnik, Lisbon, 20 June 1974
A Colone (Sophocles), male/female vv (20 minimum), 5 hn, 3 trbn, 6 vc, 4 db, 1977; Metz, 19 Nov 1977
A Hélène, Mez, female vv, 2 cl, 1977; Epidavros, July 1977
Anemoessa (phonemic text), SATB (42 minimum), orch, 1979; cond. R. Dufallo, Amsterdam, 21 June 1979
Nekuïa (phonemes and text from J.-P. Richter: Siebenkäs and Xenakis: Ecoute), SATB (54 minimum), orch, 1981; cond. Tabachnik, Cologne, 26 March 1982
Pour la Paix (Xenakis), SATB, 2 female spkrs, 2 male spkrs, tape (UPIC), 1981, version for SATB (32 minimum); cond. M. Tranchant, Paris, 23 April 1982
Serment-Orkos (Hippocrates), SATB (32 minimum), 1981; Greek Radio Choir, Athens, 1981
Chant des Soleils (Xenakis, after P. du Mans), SATB, children’s choir, 18 brass 6 (hn, 6 tpt, 6 trbn) or multiple, perc, 1983; Nord-Pas-de-Calais [simultaneous performance in several towns of the region], 21 June 1983
Idmen A/Idmen B (phonemes from Hesiod: Theogony), SATB (64 minimum), 4/6 perc, 1985; Antifona de Cluj, Les Percussions de Strasbourg, Strasbourg, 24 July 1985
Knephas (phonemes by Xenakis), SATB (32 minimum), 1990; cond. J. Wood, London, 24 June 1990
Pu wijnuej we fyp (A. Rimbaud), children’s choir, 1992; cond. D. Dupays, Paris, 5 Dec 1992
Vakchai Evripidou (Les Bacchantes d' Euripide), Bar, female vv (also playing maracas), pic, ob, dbn, hn, tpt, trbn, 3 perc, 1993; J. Dixon, cond. N. Kok, London, 1 Sept 1993
Sea-Nymphs (phonemes from W. Shakespeare: The Tempest), SATB (24 minimum), 1994; cond. S. Joly, London, 16 Sept 1994
Other vocal:
Tripli zyia, 1v, pf, 1952, unpubd
Trois poèmes (F. Villon: Aiés pitié de moy, V. Mayakovsky: Ce soir je donne mon concert d’adieux, Ritsos: Earini Symphonia [Spring Symphony]), 1v, pf, 1952, unpubd
La colombe de la paix, A, 4vv (SATB), 1953, unpubd
Stamatis Katotakis (table song), 1v, male vv, 1953, unpubd
N’shima, 2 Mez/A, 2 hn, 2 trbn, vc, 1975; cond. J.-P. Izquierdo, Jerusalem, Feb 1976
Pour Maurice, Bar, pf, 1982; S. Sakkas, C. Helffer, Brussels, 18 Oct 1982
Kassandra (Aeschylus), Bar + 20str psalterion, perc, 1987; Sakkas, Gualda, Gibellina, 21 Aug 1987 [second part of Oresteïa: see CHORAL]
La déesse Athéna (Aeschylus), Bar, pic, ob, E♭ cl, db cl, dbn, hn, pic tpt, trbn, tuba, perc, vc, 1992; Sakkas, cond. Tabachnik, Athens, 3 May 1992 [scene from Oresteïa: see CHORAL]
Chamber:
Dipli Zyia, vn, vc, 1951, unpubd
ST/4, str qt, 1956–62; Bernède Quartet, Paris, 1962
ST/10, cl, b cl, 2 hn, hp, perc, str qt, 1956–62 cond. Simonović, Paris, May 1962
Morsima-Amorsima, pf, vn, vc, db, 1956–62; cond. Foss, Athens, 16 Dec 1962
Analogique A, 9 str, 1958 [must be performed with tape work Analogique B]; cond. Scherchen, Gravesano, summer 1959
Amorsima-Morsima, cl, b cl, 2 hn, hp, perc, str qt; cond. Foss, Athens, 1962
Atrées, fl, cl, b cl, hn, tpt, trbn, 2 perc, vn, vc, 1962; cond. Simonović, Paris, 1962
Eonta, 2 tpt, 3 trbn, pf, 1963–4; cond. P. Boulez, Paris, 16 Dec 1964
Anaktoria, cl, bn, hn, str qt, db, 1969; Octuor de Paris, Avignon, 3 July 1969
Persephassa, 6 perc, 1969; Les Percussions de Strasbourg, Persepolis, 9 Sept 1969
Aroura, 12 str, 1971; cond. Tabachnik, Lucerne, 24 Aug 1971
Charisma, cl, vc, 1971; Royan, 6 April 1971
Linaia-Agon, hn, trbn, tuba, 1972; cond. Tabachnik, London, 26 April 1972
Phlegra, 11 insts, 1975; cond. Tabachnik, London, 28 Jan 1976
Epeï, eng hn, cl, tpt, 2 trbn, db, 1976; cond. S. Garant, Montréal, 9 Dec 1976
Retours-Windungen, 12 vc, 1976; Berlin PO, Bonn, 20 Feb 1976
Dmaathen, ob, perc, 1976; N. Post, J. Williams, New York, May 1977
Akanthos, 9 insts, 1977; Ensemble Studio 111, Strasburg, 17 June 1977
Ikhoor, str trio, 1978; Trio à Cordes Français, Paris, 2 April 1978
Dikhthas, vn, pf, 1979; S. Accardo, B. Canino, Bonn, 4 June 1980
Palimpsest, eng hn, b cl, bn, hn, perc, pf, str qnt, 1979; cond. S. Gorli, Aquila, 3 March 1979
Pléïades, 6 perc, 1979; Les Percussions de Strasbourg, Strasbourg, 17 May 1979
Komboï, amp hpd, perc, 1981; Chojnacka, Gualda, Metz, 22 Nov 1981
Khal Perr, brass qnt, 2 perc, 1983; Quintette Arban, Alsace Percussions, Beaune, 15 July 1983
Tetras, str qt, 1983; Arditti String Quartet, Lisbon, 8 June 1983
Thalleïn, pic, ob, cl, bn, hn, pic tpt, trbn, perc, pf, str qnt, 1984; cond. E. Howarth, London, 14 Feb 1984
Nyûyô [Setting Sun], shakuhachi, sangen, 2 koto; 1985; Angers, Ensemble Yonin-No Kai (Tokyo), 30 June 1985
Akea, pf, str qt, 1986; Helffer, Arditti String Quartet, Paris, 15 Dec 1986
A l’Ile de Gorée, amp hpd, pic, ob, cl, bn, hn, tpt, str qnt, 1986; cond. Kerstens, Amsterdam, 4 July 1986
Jalons, pic, ob, b cl, db cl, dbn, hn, tpt, trbn, tuba, hp, str qnt, 1986; cond. Boulez, Paris, 26 Jan 1987
XAS, sax qt, 1987; Raschèr Quartet, Lille, 17 Nov 1987
Waarg, pic, ob, cl, bn, hn, tpt, trbn, tuba, str qnt, 1988; cond. Howarth, London, 6 May 1988
Echange, solo b cl, fl, ob, cl, bn, hn, tpt, trbn, tuba, str qnt, 1989; H. Sparnaay, cond. Porcelijn, Amsterdam, 26 April 1989
Epcycle, solo vc, fl, ob, cl, hn, tpt, trbn, tuba, 2 vn, va, db, 1989; R. de Saram, Spectrum Ensemble, cond. G. Protheroe, London, 18 May 1989
Okho, 3 djembés, tall African drum, 1989; Trio Le Cercle, Paris, 20 Oct 1989
Ophaa, hpd, perc, 1989; Chojnacka, Gualda, Warsaw, 17 Sep 1989
Tetora, str qt, 1990; Arditti String Quartet, Witten, 27 Apr 1991
Paille in the wind, vc, pf, 1992; J. Scalfi, Woodward, Milan, 14 Dec 1992
Plektó, fl, cl, perc, pf, vn, vc, 1993; cond. R. Platz, Witten, 24 April 1994
Ergma, str qt, 1994; Mondrian String Quartet, The Hague, 17 Dec 1994
Mnamas Xapin Witoldowi Lutoslavskiemu [In Memory of Witold Lutosławski], 2 hn, 2 tpt, 1994; cond. W. Michniewki, Warsaw, 21 Sept 1994
Kaï, fl, cl, bn, tpt, trbn, vn, va, vc, db, 1995; cond. D. Coleman, Oldenburg, 12 Nov 1995
Kuïlenn, fl, 2 ob, 2 cl, 2 bn, 2 hn, 1995; Netherlands Wind Ensemble, Amsterdam, 10 June 1996
Hunem-Iduhey, vn, vc, 1996; E. Michell, O. Akahoshi, New York, 9 Aug 1996
Ittidra, str sextet, 1996; Arditti String Quartet, T. Kakuska (va), V. Erben (vc), Frankfurt, 4 Oct 1996
Roscobeck, vc, db, 1996; R. de Saram, S. Scordanibbio, Cologne, 6 Dec 1996
Zythos, trbn, 6 perc, 1996; Lindberg, Kroumata Ensemble, Birmingham, 10 April 1997
Solo instrumental:
Seven piano pieces without title, Menuet, Air populaire, Allegro molto, Mélodie, Andante, pf, 1949–50, unpubd
Suite, pf, 1950–51, unpubd
Thème et conséquences, pf, 1951, unpubd
Herma, pf, 1960–61
Nomos alpha, vc, 1965–6; S. Palm, Bremen, 5 May 1966
Mikka, vn, 1971; I. Gitlis, Paris, 27 Oct 1972
Evryali, pf, 1973; C. Helffer, Paris, 1974
Gmeeoorh, org, 1974; C. Holloway, U. of Hartford, CT, 1974
Psappha, perc, 1975; S. Gualda London, 2 May 1976
Theraps, db, 1975–6; F. Grillo, 26 March 1976
Khoaï, hpd, 1976; E. Chojnacka, Cologne, 5 May 1976
Mikka ‘S’, vn, 1976; R. Pasquier, Orléans, 11 March 1976
Kottos, vc, 1977; M. Rostropovich, La Rochelle, 28 June 1977
Embellie, va, 1981; G. Renon-McLaughlin, Paris, 1981
Mists, pf, 1981; Woodward, Edinburgh, 1981
Naama, amp hpd, 1984; Chojnacka, Luxembourg, 20 May 1984
Keren, trbn, 1986; B. Sluchin, Strasbourg, 19 Sept 1986
A r. (Hommage à Ravel), pf, 1987; H. Austbö, Montpellier, 2 Aug 1987
Rebonds, perc, 1988; Gualda, Rome, 1 July 1988
Tape
some works exist in one or more revised realizations
Diamorphoses, 2-track, 1957–8; Brussels, 5 Oct 1958
Concret PH, 2-track, 1958; Brussels, Philips Pavilion, 1958
Analogique B, 2-track, 1958–9 [must be performed with chbr work Analogique A]; cond. Scherchen, Gravesano, summer 1959
Orient-Occident, 2-track, 1960; Cannes, May 1960
The Thessaloniki World Fair (film score), 1-track, 1961
Bohor, 4-track, 1962; Paris, 15 Dec 1962
Hibiki Hana Ma, 12-track, 1969–70; Osaka, Expo 70, 1970
Persépolis, 8-track, 1971; Persepolis, 26 Aug 1971
Polytope de Cluny, 8-track, lighting, 1972; Paris, 17 Oct 1972
Polytope II, tape, lighting, 1974; Paris, 1974
La legénde d'Eer (Diatope), 4- or 8-track, 1977; Paris, 11 Feb 1978
Mycenae alpha, 2-track, UPIC, 1978; Mycenae, 2 Aug 1978
Taurhiphanie, 2-track, UPIC, 1987; Arles, 13 July 1988
Voyage absolu des Unari vers Andromède, 2-track, UPIC; Osaka, 1 April 1989
GENDY3, 2-track, Dynamic Stochastic Synthesis, 1991; Metz, 17 Nov 1991
S 709, 2-track Dynamic Stochastic Synthesis, 1994; Paris, 2 Dec 1994