Trigger Man is an action game where the main protagonist Trigger Man works for the Coladangelo Family, who is on the brink of a mafia-style war with the rival Montagano Family. The Montagano Family believes Don Coladangelo is responsible for the death of their Don's son. Players need to visit typical locations such as villas, restaurants and casinos to take down members of the opposing family from a third-person perspective.
The gameplay involves basic action missions, stealth, and escorting. Some sections require finding a key to progress. When fighting, there is a focus on head shots, as enemies can take a lot of bullets in other body parts before going down. There are eight missions in total.
Players have access to different types of weapons, including a blade, machine guns and sniper rifles. However, only a small amount of clips can be carried. Enemies hardly ever leave behind any ammo, so players need to hunt down ammo crates.