Battlefield Hardline

This takes place on Episode 9 - Independence Day, when the objective is to "Get to the Boat". Before going to the balcony, use the armoury to equip a Bald Eagle with Optics and a Heavy barrel, as this is the best weapon combination to use for the achievement. As you reach the balcony, a cutscene will begin where you begin to zipline and are hit by a helicopter. As you change direction, your character will pull out his pistol and you must kill an enemy before hitting the balcony, which is about a 2-3 second window of opportunity. Aim down the zipline, slightly to the right, and shoot at the flashlight. Pause your game just as you are about to hit the balcony! If you got the kill, the achievement/trophy will unlock, and if you didn't select "Restart Checkpoint". If you wait too long, the game will not allow you to restart the checkpoint. Keep trying until you kill someone!

Near the end of Mission 9, after you survived the enemy waves you will have to zipline down the building. After a helicopter flies into the zipline and pulls you up, you will swing back towards the building.

At this point you have to kill one of the enemies and you only have a few seconds to shoot.

Before you start this, make sure you have a strong weapon like the TEC-9 or the BALD EAGLE equipped. You can switch weapons in a room near the zipline.

If you fail, you can restart the checkpoint or back out into the menu and resume (if it doesn't let you use the checkpoint)

Near the end of Episode 9: Independence Day, you will need to escape the penthouse via a zip-line. You can earn the achievement with any handgun but before going to the balcony to escape, you might want to go to the armory and equip the Bald Eagle because it has high damage. When you zip-line off the building it will be hit by a helicopter and it will turn you around facing back to the penthouse with your handgun equipped, you have a couple of seconds to shoot and kill one of the enemies on the balcony. If you do not kill one of them, immediately restart the last checkpoint or exit to the main menu and continue and try again.

Here is a video guide with English commentary for the "Real Action Hero" achievement!

After escaping the penthouse, kill a criminal mid-air in independence day. Before going to the balcony, use the armory to equip a Bald Eagle with Optics and a Heavy barrel, as this is the best weapon combination to use for the achievement. As you reach the balcony, a cutscene will begin where you begin to zipline and are hit by a helicopter. As you change direction, your character will pull out his pistol which you must kill an enemy before hitting the balcony. Aim down the zipline, slightly to the right, and shoot at the flashlight. Pause the game to see wheather you got the kill or not because if you wait too long, you'll have to restart the entire episode to try again. Achievement/trophy pops if an enemy's flashlight goes out.