To enact the plan to kill Aleksis in Devouring of the Lambs in Updaam in Deathloop, go 2 levels above the party at Dorsey Manor into Aleksis quarters and find his bathroom. Take a note of the number combination on the mix pad next to his toilet.

Go back down to one level above the main party into the area overlooking the dance floor with the mix pad and enter the same code as was set on the mix pad in Aleksis’ bathroom.

Aleksis will reveal himself and you can go down and kill Aleksis.