The prison is highly secure. Although it would not be too difficult for you to slip inside undetected, getting your Brother out will not be so straightforward. Your best bet is to go in disguised as someone who would have the authority to remove an inmate from the prison.
Pose as a Qadi, here to pass judgement on the innocence of the prisoner.
The guards at the prison gate jump to allow you quick entry as a Qadi has sufficient authority to refute Caliphal law. When you declare your Brother innocent, none of the guards dare to challenge you. A Qadi is the perfect disguise!
Pose as a Shurta, here to take the prisoner away for execution.
The guards at the gate allow you entry, but ask why someone in prison for theft should face execution. If you had posed as a Qadi, you would have had enough power to remove the prisoner without facing a challenge from the guards. You may have to answer more questions on your way out.
Pose as a Ghulam, here to take the prisoner out, and not to answer questions!
Your lack of authority as a soldier means the guards feel able to question you further. This would not have arisen had you posed as a Qadi. The guards begrudgingly allow you to enter the prison but mutter about checking with superiors.
Once inside the prison one of the guards begins to escort you to where your Brother is being held. He asks you what crime the prisoner you have come for committed—what do you tell him?
Just tell the guard the truth, you don't want to complicate matters.
The guard nods and continues walking, agreeing that most prisoners are either debtors, thieves, or both. He doesn't appear to have any suspicions regarding you yet. Mixing a little truth into a lie makes it more believable, that was the right decision.
If you make the prisoner sound important the guard might get you to him faster.
The guard takes you to the Mutbaq—a terrifying series of deep wells with important prisoners at the bottom of each of them. This detour costs you more time, you should have just told the guard the truth! You manage to backtrack, telling the guard he must have misheard, but he is looking at you suspiciously now, you will need to be more careful.
If you make the prisoner sound dangerous the guard might stop questioning you.
The guard accuses you of being a fraud, since murderers are not imprisoned, they are executed! You are forced to knock out his guard and find another to help you reach your Brother. You should have just told the truth!
When you finally reach your Brother and free him from his restraints, he stands shakily on a broken leg. He whispers that the Astrolabe piece is gone, stolen from him by a guard as he was arrested—the same guard who is waiting to escort you both out! How will you get the piece back?
The guard does not know the importance of the piece; he just wants to sell it for a couple of coins.
Guards are underpaid and supplement their income by stealing from prisoners. He hands over the piece of Astrolabe. You are confident that the guard will keep quiet because he will want to stay out of trouble for theft. That was tactfully done.
Hopefully the guard won't notice the theft until after you leave the prison.
You manage to steal the piece from the guard on your way out of the prison. Unfortunately, he soon notices it was missing and starts searching for it—you had better leave the prison immediately. Perhaps you should have paid him for it instead.
Hopefully you can find your way out without his help.
You succeed in incapacitating the guard and snatching the piece, but finding your way out takes longer without a guide and arouses suspicion. Paying the guard would have held less risk.
That was skillfully executed. The guards seemed unaware that all was not as usual today.
The guards appeared suspicious as you left, but they did let you pass through with the prisoner. That was close!
An alarm was raised as you were about to leave the prison and you had to run. You escaped, but your fellow Hidden One's leg was injured further in the pursuit, and he may not be able to serve the Hidden Ones again for a long time.
Mission Completed! You left the prison with both your Hidden One Brother and another piece of Astrolabe. You did well! You should prepare yourself for the Hidden Ones' next mission. The Astrolabe is of the utmost importance, you must continue to retrieve the pieces."
Choices within each step were reordered based on the score given in the application's source code, from best possible choice (score of 3) to worst possible choice (score of 1). Considering the hint included in each step points towards the best answer, it is assumed that is the canon choice.
The memory name seems to be an allusion to the story of Cain and Abel as written in the Bible's Book of Genesis 4:1–18. After Cain slew Abel out of jealousy over God favoring Abel's hunting offerings over Cain's harvest offerings, God asked Cain for Abel's whereabouts, even though he already knew of Abel's murder due to being a deity. Foolishly choosing to lie, Cain replied, "I do not know; am I my brother's keeper?".[2]