The Anticapitalist Left Cooperation for the Overthrow (Greek: Αντικαπιταλιστική Αριστερή Συνεργασία για την Ανατροπή, romanized: Antikapitalistiki Aristeri Synergasia gia tin Anatropi), better known domestically by the acronym ΑΝΤ.ΑΡ.ΣΥ.Α.

[11] The Organisation of Internationalist Communists of Greece (Greek: Οργάνωση Κομμουνιστών Διεθνιστών Ελλάδας, romanized: Organosi Kommouniston Diethniston Elladas), a Trotskyist party, participated in the foundation but left after a few weeks, on 18 May 2009,[12] citing objections to what it perceived as the coalition "reformist" focus on parliamentary politics and to the invocation in the foundational document of historical events on which Trotskyists have a very different view.

Its major positions are[14] Τhe formation of ANTARSYA is understood to have been in explicit opposition to what the radical left in Greece assessed as the "social reformism" of Syriza and its leadership, which ultimately stood in support of austerity policies.

[15] The coalition also supports a comprehensive banning of layoffs; a minimum salary, currently determined to the amount of 1,400 euros per month; a reduction of working time to 35 hours per week, without reduction in wages; complete disarmament of the Greek police; the granting of full political and social rights to all immigrants; and an eco-socialist response to the ecological crisis.

[14] ANTARSYA's participation in the electoral, parliamentary process commenced with the European Parliament elections in June 2009, where the coalition took in 21,951 votes or 0.43% of the total.