1. Miscellaneous
1.1. Total CARnage – Destroy 5 cars in 5 seconds
1.2. Drop Everything – Comet Drop over 170 meters
1.3. Keep It Up – Stay in the air for more than 45 seconds
1.4. Hat Trick – Defeat an enemy using three different power sources
1.5. Double Smoke Stack Attack – Dash through air vents and then Comet Drop
1.6. Cough Drop – Comet Drop on three coughing enemies

Total CARnage
Destroy 5 cars in 5 seconds
This can easily be done by using the Cinder Missile (Smoke Power). Fully upgrade this ability, so that you can carry five missiles. Consume smoke (marked with brown dots on the mini-map) to gain maximum missiles. Wait on a road until 5 cars are lined up in front of you. Now shoot each car with a missile in quick succession.
There are also lots of parking areas around the map. Cars spawn there randomly and sometimes you can find more than 5 parked vehicles in one location.

Drop Everything
Comet Drop over 170 meters
This can only be done after beating the story!
You need to climb up the tallest building in the game, which is located in Uptown. The way up the building will be blocked until you reach the final story mission. After beating the final mission you need to return to this place in free roam mode.
Follow the same path you took during the story. You start by dashing through an air vent (Smoke Power) and then jump from platform to platform. Once you reach the top you need to consume Video Power. Use this power to glide up the final wall. There’s a satellite dish on the rooftop. Glide towards the satellite dish and you will be tossed further up into the air. Quickly use a double air surge (press Circle-Button twice in a row) and then hold down the Square-Button to perform a Comet Drop. You need to land on the street level! It is important that you dash forward far enough so that you won’t hit any obstacles on your way down. But you may not hold the Dash-Button for too long or you will get below 170 meters.

Keep It Up
Stay in the air for more than 45 seconds
This can only be done after unlocking the Video Power. It’s unlocked automatically during the second half of the story.
You also have to buy the “Airwave” ability from the Video skill tree. Go to the tallest skyscraper on the northern island. It is located in Belltown district in the north-eastern part of the map. Make sure you have the Video Power activated, climb up the building and fly into a satellite dish to be tossed into the air. Once you are in the air, hold down the X-Button to glide and immediately pull back the left stick. The Airwave ability will now kick in and you drop significantly slower. It will take well over a minute until you reach the street level.

Hat Trick
Defeat an enemy using three different power sources
You have to play through the story to unlock 3 different powers!
There are four powers and they are marked with the following colors on your mini-map:

Smoke = Brown (Chinmeys, Destroyed Vehicles)
Neon = Purple (Neon Signs)
Video = Blue (Satellite Dishes, TVs and other Screens)
Concrete = Grey (Fallen Enemies, only available after beating the story)

To change to a different power, simply consume the respective power source. Look for a single enemy, or kill a group of enemies and leave only one alive. Now shoot this enemy one time with each power and kill him.
If you have already cleared all areas of enemies you can still get this trophy! Simply wait for a DUP Raid (shown with red circle on world map) or look for a patrolling vehicle.

Double Smoke Stack Attack
Dash through two red air vents without touching the ground and then Comet Drop on an enemy
Red air vents can only be used while the Smoke Power is active. You need to dash through two of them in a row by using the Circle-Button. You may also use the glide ability (X-Button) to navigate between the air vents. To use Comet Drop you need to hold down the Square-Button while in the air.
A good location for this is in the Uptown district, which is on the southern island. This district has two DUP command centers and the one on the left side of the map is perfect for this. The buildings to the south of the command centre have lots of red air vents. You need to enter the first one on street level. Halfway up the building are additional air vents. Use double dash and glide to navigate to the second vent and you will be tossed into the air. Now you only need to Comet Drop to the platform that holds the DUP mobile command. There are lots of enemies on that platform. The enemy does not have to die, he just needs to stand in the impact zone.

This can still be done after clearing the zone of enemies. From time to time, you will get a notice about “DUP Raids”. The raids reset all enemies around DUP command centers. You will then see a red circle on the world map. Keep doing these raids until one takes place in the required location.

Cough Drop
Comet Drop on three coughing enemies
This works best against large groups of drug dealers. They are marked with a blue syringe symbol on the mini-map. They spawn randomly, so you might need to run around for a bit. It doesn’t matter what karma you have. Even if you have maxed out your bad karma, the drug dealers will still spawn. They also do keep spawning after beating the story and after clearing out all D.U.P. of each district.
Simply throw a Sulfur Bomb at them (Smoke Power). The Sulfur Bomb is unlocked in the very beginning of the game and can be used by pressing L1. Once the bomb hits the dealers, wait for a second and Comet Drop on them. To perform a quick Comet Drop simply stand next to the enemies, jump in the air and then press Square. The more drug dealers there are, the better your chance of hitting 3 at once. Again, it’s random how many dealers there are and where they are located. A little jump from the street level will suffice.

If you have good Karma you can also buy the upgrades “Corrosive Fumes” and “Giant Sulfur Bomb”. It’s not needed, but it will increase the duration and radius of the Sulfur Bomb and makes this trophy a tiny bit easier.