A retrospect into ethos, this study examines the impact of individualism, collectivism, ethical idealism and interpersonal trust on negotiators' attitudes toward questionable negotiation tactics in Greece. A thousand survey questionnaires were administered to Greek employees, of which 327 usable responses were collected. Our findings empirically corroborated a classification of three groups of negotiation tactics, namely, pretense, deception and lies. Individualism–collectivism and ethical idealism were found to be related, and interpersonal trust was found to be unrelated, to attitudes toward questionable negotiation tactics. Emphasizing the non‐US and non‐Western European nature of the empirical data collected, the originality of this research further stems from the development of a comprehensive research framework about questionable negotiation tactics in Greece.