Guilt

Guilt is a 2009 Greek-Cypriot experimental surrealist horror film written and directed by Vassilis Mazomenos. It stars Nikos Arvanitis as a retired arms dealer, now old and dying, who experiences nightmarish visions that are manifestations of the guilt he feels for his role in three pivotal periods of Cypriot political history: the Cyprus Emergency in the 1950s, the Turkish invasion of Cyprus in the 1970s, and the killing of Solomos Solomou in the 1990s.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.