Mission 1: Merchant's Street Market
The past can never leave Sam. Somehow his old friend, Grim, has found him. The conversation doesn't follow the traditional route of catching up on old times. It is to inform him that hostiles are about to converge on his current position and that he must leave to take cover immediately. Head toward the vendor stalls and follow the on-screen directions about taking cover. A short flashback to Sam's life 20 years prior occurs, during which Sam tries to convince his young daughter about the benefits of darkness (Oh, Sam…). These short flashback segments serve as a tutorial.
Switching back to the present situation, Sam finds himself now under cover of darkness and hidden from a trio of paranoid thugs holding flashlights. There's no need to go about it any way other than shooting everyone square in the face. You once again return to Sam's past and learn about the Execute ability. Afterwards, employ a stealth takedown on the lone guy to gain an Execute, and then mark the good-as-dead targets to finish the Execute. The next task is to find and interrogate the gang leader, Dmitri Gramkos.
As Sam comes upon multiple options for cover, have him lean up against the one furthest away, on the right. Wait for the guy in orange to wander close and eliminate him for an Execute. Mark the two nearest guys for an Execute and gun down a third. Upon seeing his friends drop like flies, Gramkos flees to the grimy bathroom down the stairs. Follow him down and bash the door open. Sam displays his brutal interrogation techniques by being able to shove Gramkos' face into the various urinals and sinks to loosen up his stubborn disposition.