In a threat to Berlin, the left-wing leader vowed to do “whatever is necessary” to extract the staggering sum of money - including taking legal action.
A group of Greek MPs, who have looked into the issue of compensation payments linked to the Nazi occupation of Greece between 1941 to 1944, are set to demand Germany coughs up €269bn (£234bn) in damages.
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The parliamentary committee will reportedly recommend the country uses diplomatic means to recover the huge sums but - “if necessary” - pursue legal action through international courts should talks between Athens and Berlin fail.
Their 77-page report will be discussed in the Greek parliament early next month.
Mr Tsipras signalled he will back their demands by issuing a defiant message to German chancellor Angela Merkel.
Speaking during a visit to Kommeno on the 73rd anniversary of a Nazi atrocity in the northwestern village, he said: “Greece will do whatever is necessary, mainly at a diplomatic level, and if necessary, at a legal level.
“Greece and its people do not forget the slaughter and war crimes of the Nazi army and demands a tangible recognition by the German government, even one that is 73 years late.”
Greece will do whatever is necessary, mainly at a diplomatic level, and if necessary, at a legal level.
During the Second World War occupation of Greece, Nazi troops killed 317 locals in Kommeno on August 16, 1943 before torching the village’s buildings.
Mr Tsipras laid a wreath in memorial to the victims during his visit on Tuesday.
The issue of war reparations has heightened since Greece plunged into near-bankruptcy as a result of the eurozone crisis, with Mr Tspiras’s leftist Syriza party regularly raising the divisive subject.
Over the past few years Athens has regularly been required to haggle with the German-dominated eurozone in order to secure bailouts to stop Greece defaulting on its massive debts.
Last week, Mr Tspiras reminded Germany how its own debts were cancelled after the Second World War, as his recession-hit country continues to be plagued by the eurozone’s troubles.
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German chancellor Angela Merkel and her ministers have routinely dismissed Greek demands for Second World War reparations, which could total nearly ten per cent of Germany’s GDP.
Speaking last year, the German leader said: “In the view of the German government, the issue of reparations is politically and legally closed.”