A very easy and straightforward level, especially since Anna has a decent arsenal. Your first task will be to help Artyom fend off a Watchman attack from a sniper’s perch. Then you will have to climb down and work your way to Artyom through a series of enemy encounters. Many of these encounters occur initially without the enemies knowing Anna is there so stealth tactics can be applied, though you will likely end up having a shootout with one of the groups. Finding Artyom will begin a cutscene and unlock the achievement.