The Echostreet Alley Gang Stronghold is located in northwestern Lambeth borough, just south of Waterloo Station and it requires us to take out nine Blighters who have taken up residence in the area. It’s a good idea to climb up to the rooftops and use your Eagle Vision to tag the enemies as soon as possible. In addition to revealing enemy locations, it will also display the optional objectives – the Heist Plans that we need to burn and the Rook that we need to capture in white.

The Blighters holed up on this area are made up of two Snipers, a Lookout, the Leader and five standard melee units. All nine of them are usually patrolling set routes or stationary in set locations, but you’ll want to watch out for the lone rooftop Sniper in the middle of the area.

The Lookout can be found patrolling along the southern edge of the restricted area and should be taken out first to prevent him from calling in reinforcements. Using throwing knives from rooftops is a great way to take out isolated bad guys. We can also sneak up and assassinate most of the enemies after observing their patrol patterns.

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You’ll want to eliminate the Lookouts first (left) and then free the Rook (right).

There is a single Rook we need to rescue for the optional objective and he can be found in the small courtyard in the center of the buildings. It’s a good idea to rescue him with only 1-2 enemies left though as if you free him he’ll attack the enemies and you’ll have to try to keep him alive.

Before killing all of the enemies, you’ll also want to check out the westernmost building via the door at ground level or one of the open windows. Inside you’ll find a single Blighter and the Heist Plans that we need to burn for the optional objective.

Once you have completed the optional objectives, deal with the other enemies as you wish. Once they are all dead, the memory will be completed.