I'm still interested in what's going on in Achaea. Is it more just non-Nazi anti-austerity than anything else?
Achaia used to be a PASOK stronghold. As mentioned earlier in the thread, the Papandreou family originated from the Achaian town of Kalentzi. Patras (Greece's third most populated municipality) has been almost exclusively ruled either by the PASOK or by KKE mayors; if I trusted the Greek Wikipedia, it only had a right-wing (ND) mayor between 1999 and 2002.
From at least 1996 to 2009, PASOK had always topped the polls in Achaia. In 2009, it won 52.65% against only 28.99% for ND. PASOK's support collapsed to 14.11% and then 13.49% in the two 2012 elections with many of its voters going to SYRIZA. This year, PASOK's voters seems to have continued to flow toward SYRIZA but at a slower pace; the combined result of PASOK (3.89%) and KIDISO (5.87%, its best national result) is 9.76%.
KIDISO map:
Best national result (20.41%) in Erymanthos, where Kalentzi is located (as noted in a previous post, KIDISO got 53.65% there!). KIDISO had its best results in some of the old PASOK strongholds like Achaia, Crete, and Elis. On the other side, like PASOK, it failed badly in Athens, Piraeus and Thessaloniki.
Union of Centrists map: