In the game, released on Thursday, the hooded and stealthy hero fights his way through an ancient maze of alleyways, souqs and rooftops, rendered in loving detail with what its creators say is the help of historical sources.
The central character, pickpocket turned master assassin Basim, speaks classical Arabic in Assassin's Creed Mirage, the 13th edition of the popular franchise published by French company Ubisoft.
"We were waiting for a game that shows Arab and Islamic culture, the culture and history of Iraq and this region, which does not just consist of wars and terrorism," said one fan, Mohammed Bashir.
Sitting in a Baghdad internet cafe, surrounded by fellow gamers, the 30-year-old graphic designer marvelled at the 3D depictions of ancient Iraq and Baghdad.
As the story unfolds and Basim dispatches a long line-up of foes, the real star is the setting, resplendent with turquoise mosaic domes, carpet sellers and lush oasis towns.
"There's Iraqi music!" exclaimed one young man in the room, lit dimly by screens and fluorescent blue neon lights, where other players were absorbed in football and other video games.
The game had already received a rave review last month from Saudi Arabia's Khaled Almutairi, who praised an advanced version on his YouTube channel Gamer Snack, followed by more than two million.
The game allowed him to "immerse" himself "in the Arab and Islamic environment", he said, expressing joy at hearing the Muslim call to prayer and the expression "salam alaykum", or "Peace be upon you", on screen.
His only quibble was that the Arabic "lip sync ... is poor".
For Bashir – who came of age as Iraq was rocked by years of conflict – seeing an artistic and beautiful representation of the country's ancient marvels provoked mixed feelings.
"It's beautiful to see Baghdad's glorious past," said Bashir, who also posts video game reviews on YouTube and Instagram.
He praised the game's designers for "recreating a lost city", because – after Baghdad was sacked by Mongol forces in 1258 – the Abbasid Caliphate "did not leave any trace".
But Bashir said seeing Baghdad in all its former glory was also "bittersweet when we know what the city has experienced in recent years".
Iraq has been rocked by repeated wars, most recently the US-led invasion of 2003 that deposed dictator Saddam Hussein and sparked years of sectarian conflict and the rise of ISIS.
When Iraq has been the setting for video games, it has more commonly been in those of the first-person tactical shooter variety, such as Six Days in Fallujah launched this year.
That game, based on gruelling urban combat in the city west of Baghdad, is billed as recreating "true stories of Marines, soldiers and Iraqi civilians during the toughest urban battle since 1968".
Haider Jaafar, who heads the Iraqi Federation of Electronic Sports, said the new Assassin's Creed game "will reach millions of people" and give foreign audiences "a positive image of the origins of Baghdad".
Jaafar, who owns the Cooldown cybercafe, said he hoped it will also help promote the gaming sector and fan base in Iraq.
"When we participate in international competitions ... people usually ask us: 'Do you really have video game and internet centres?'" he said with a laugh.
Mustafa Mahmud, another gamer, said he had "impatiently" awaited the game after playing all previous editions, set in different times and places from ancient Egypt to revolutionary France.
"We saw the previous episodes in France, Greece, Egypt," said Mahmud, a student who also works as an IT support at the cybercafe. "We were excited to see Iraq."