There are many different contextual assassination techniques, though they can be separated into two groups: those that are Low Profile, thus suitable for stealth situations, and High Profile kills that are much more likely to attract attention. As a general rule of thumb, an assassination performed with 
/
alone will be low-key in nature, while holding 
/ 
will lead to a more showy and violent killing move. During the early stages of the story, most assassination types can only be performed on a single target. (Those familiar with the Assassin’s Creed series should note that Arno can acquire the ability to perform Double Assassinations and Air Assassinations after a later skill unlock.)
Standard Assassination: Performed while level with one or two aligned targets.
Low Profile: Arno will stab his targets discretely, though this will still lead to consequences if witnessed. It’s highly effective when employed from behind on sentries or patrolling guards.
High Profile: Arno will knock the targets to the ground as he delivers the killing blow. Note that this can be performed while running.
Ledge Assassination: Performed while hanging from a ledge just below a target.
Low Profile: Arno will reach out to grab (and stab) the target, then hurl them over the ledge. This is useful if there are other hostiles on the same level that you really need to avoid, but not so great if there are patrols or guards below.
High Profile: Arno leaps up and knocks his quarry to the ground to perform the killing blow. This is the most efficient technique against solitary rooftop sentries.
Cover Assassination: Only available when pressed against a suitable surface or corner after tapping 
/ 
.
Low Profile: Arno quickly rounds the corner, stabs the victim, then pulls them back and lowers them to the floor.
High Profile: Arno bursts into view to leap on his quarry.
Air Assassination: Performed from above, this spectacular move can be performed from surprisingly lofty heights.
High Profile Only: Arno will leap onto highlighted victims from above, killing them instantly.
Hiding Place Assassination: Performed from any kind of hiding place.
Low Profile: Arno will reach out and simultaneously grab and stab a target within range, then pull them into his place of concealment.
High Profile: Arno will leap out to stab a passing adversary.