Irish Unionists are calling for a ban on sales of Mafia III, claiming one of its missions "glorifies" an Irish terrorist organisation.

The mission in question, entitled "I.R.A. Don't Ask," has protagonist Lincoln Clay stealing a trio of cars for a character with connections to Irish Republican Army.

Upon completion of the mission, Clay is told "the brothers back in Belfast really appreciate your help," with the implication that the cars will be used in bombings back in Ireland.

Other dialogue in the game discusses Irish Republican politics, and graffiti can be found defacing Ulster banners (representing Northern Ireland).

Irish Democratic Unionist MP Jeffrey Donaldson told the Irish News that the game "could be seen as trivialising the suffering of innocent victims and the evil that is represented by all forms of terrorism."

"I invite the makers of this game to come to Northern Ireland and meet some of the innocent victims of the IRA and then consider whether the contents are appropriate," he said.

Likewise, Traditional Unionist Voice party leader Jim Allister called the game a "sick glamorisation of terrorism," claiming the developers were insensitive "as victims were directly impacted by actions such as those portrayed in this game."

Mafia III is set in 1968, around the time that the Troubles began in Northern Ireland, with the largely Protestant Unionists fighting against the largely Catholic Republicans, over a range of historical, political, and religious issues, including whether or not Ireland should be part of the United Kingdom.

The IRA was notorious for executing thousands of bombings and other terror attacks over the Troubles' three decades.

Though publisher 2K Games has not commented on the claims, historical authenticity has been stated as one of the game's principal goals.

Mafia III is out now for new-gen consoles and PC.