Assassin's Creed Mirage: Walkthrough & Boss Guide

This is a condensed story overview plus notes on three notable targets (Al-Ghul, Warlord Wasif and the finale). It is not a complete investigation-by-investigation walkthrough, and the order of the bureau investigations in the middle of the game is not fixed here. The plot summary follows Wikipedia; the investigation details follow GamerGuides and a fan walkthrough, as listed under Sources.

In 861 CE Basim is a street thief in Anbar with his childhood friend Nehal, and he is haunted by visions of a jinni. After Basim steals a chest from the Caliph's palace, Nehal kills the Caliph al-Mutawakkil to save him. The guards then massacre Anbar's thieves, Basim blames Nehal and the two part ways.

Roshan helps Basim escape to Alamut, the Hidden Ones' fortress, where he trains and is initiated. Afterwards Basim and Roshan lead a Hidden Ones contingent to Baghdad.

In Baghdad Basim learns that five members of the Order have infiltrated the Caliphate's highest ranks and are excavating or rebuilding Isu artifacts. Wikipedia describes Baghdad as four districts: the Round City, Karkh, Abbasiyah and Harbiyah. The GamerGuides investigation pages also refer to a Sharqiyah Bureau in the east of the city. We have not verified a single correct order for the bureau investigations, so none is given here.

According to the fan walkthrough, Al-Ghul (real name Mas'ood Al-Ya'qoob) runs Baghdad's prisons and forces the Caliphate's enemies to work its dig sites; he is the first Order member you assassinate. The case follows the Ali ibn Muhammad investigation, which begins with freeing Ali from Damascus Gate Prison. Ali regroups with Roshan and the rebels at the Watermill in the Wilderness north of Baghdad, and talking to Roshan reveals Al-Ghul as the target. Completing the Al-Ghul case unlocks the Nehal investigation.

GamerGuides lists the Dogan bin Arslan investigation as the prerequisite for the Sharqiyah Bureau. The bureau's targets are Admiral Nadir (Al-A'eshma, killed at his Southern Camp), General Jasoor (Al-Rukh, killed at Qasr Salih in northern Karkh) and Warlord Wasif (Al-Mardikhwar), who is stationed in the Great Garrison in eastern Baghdad and is the final target. The same guide lists further investigations under the codenames Al-Rabisu (the Great Symposium), Al-Anqa (the Bazaar), Al-Kullulu (the Harbormaster) and Al-Pairika (the Treasurer).

Near the end of the story Basim confronts Qabiha, the Order's leader. She says the answers he is looking for lie in an Isu temple beneath Alamut and tries to take him there, but Roshan intervenes, kills Qabiha and warns Basim to stop investigating. Basim ignores her and travels to Alamut, where he finds the fortress under siege by the Order. He frees captured Hidden Ones and helps repel the attack, then heads into the temple. Roshan tries to stop him; Basim defeats her but spares her life. Inside the temple he learns that it once held the Isu Loki prisoner and that Nehal never existed: she and the jinni were manifestations of his repressed memories as Loki. He accepts his nature as Loki's reincarnation and regains Loki's memories. Afterwards the Hidden Ones welcome Basim back and Roshan resigns in protest.