Note! Selecting this mission is recommended only if you follow the evil path, i.e. you strive for amassing Bad Karma. It is worth knowing that starting this mission lock access to mission 13a (Flight of Angels), which has been prepared with playing, as the main character, in mind.
The starting point is right next to Eugene's hideout, i.e. in the Rainier district. Make sure that you approach the correct marker, because the one for the mission with good karma is right next to it. After you watch the cutscene of the meeting with Eugene, go towards the building site in the North-Eastern part of the Lantern District. You will have to eliminate here a group of armed members of the Akurans, who are staying inside a multi-storey parking.
Depending on your preferences, you can start securing the parking lot from the rooftop or from the ground level. You should not experience too many problems here, because the gangsters do not wield any super-human powers. Still, you should be careful while attacking larger groups of opponents, and avoid extensive fire from them. If you want to, you can use this mission to conduct further tests of your Video powers, but there are no interactive objects here, which you could use to regenerate so, you can just as well switch to Smoke or Neon.
During the fights, wait for Eugene to confirm and, after he does, consider reaching the top level in the parking lot, i.e. the one under the naked sky. The gangsters should follow you and they will be additionally surprised when they are attacked by demons summoned by Eugene. The monsters will be picking up single opponents, which will make it easier for you to win.
Follow Eugene's suggestion and get to the rooftop of one of the tallest buildings and press the up button on the d-pad to produce the phone from your inventory and activate the tracking app. Turn to face the correct direction and go towards the destination. Your first stop is the Salmon Lake building, located in the Northern part of the Waterfront district. Jump down and find the narrow corridor guarded by some gangsters. Take this passage to reach the hideout of the Akurans and deal with the armed opponents.
Again, reach one of the rooftops and use the tracking app to find another place of staying of the gangsters. Your current destination is the greenhouse on the rooftop of the building in the South-Western part of the Lantern District. You need to watch out here, because the site is small and the fights will soon be joined by additional D.U.P. soldiers. Use the strong AoE attacks and, in the first place, eliminate those of the soldiers that also use special powers. (you can, at the same time, kill several snipers occupying rooftops in the area).
It is high time that you used the tracking device for the last time (you should, of course make sure that you position yourself on a rooftop, or a high ledge, beforehand). Your destination is the quite big park in the central part of the Denny Park district. You are up for a big fight here, during which you will be supported by angels and demons.
Make sure that you are well-prepared for the fight (regenerate your health, replenish heavy artillery, etc), because there are many hostiles around here. tart attacking the gangsters and the soldiers. In the first place, target the elite opponents that resemble scientists, because it is their attacks that may threaten Delsin. Also, keep walking away from the center of the park always when Delsin takes heavy damage, or whenever he has depleted his supplies of power (the type of the special abilities that you use here does not matter - it is best to choose the most developed one).
In the park, there will appear two elite D.U.P. agents, who are similar to the boss that you have fought during the eighth mission of the game. You do not need to worry too much, because the game does not make you deal with them by yourself only. Avoid their attacks (especially the huge concrete fragments that they hurl) and eliminate the weaker enemies at the same time. You need to keep defending until Eugene summons a big angel. Only then help the allied creatures with the D.U.P agents (remember to hit them directly, instead of focusing on the levitating objects that surround the remaining enemies. This mission - The Return - will soon end and the next one will be unlocked.