BioShock Infinite: The Complete Edition

Throughout the campaign, you'll need to ride the team lines, or sky lines. Aiming at an enemy will cause a crosshair and flashing yellow icon to appear on the enemy. Press while this is present and Booker will jump from the sky line to the enemy, killing them.

This doesn't work on all enemy's, such as Patriots and "Special" enemies with tonics.

In the level monument towards when you get on the zip line there will be and guard who shoots at you jump on him and kill when it turns yellow then get back on and do the same to the other guard restart from last checkpoint rinse and repeat

This can be paired with SKEET SHOOT when you first get on the zip line a guard shoots at you jump onto his platform melee him off and shoot him as he falls then simply restart last checkpoint rinse and repeat

This can be paired with ON THE FLY as you just need to kill the guards restart from checkpoint
Rinse and repeat

This can also be paired BOLT FROM THE BLUE when you stop on the zip line a guard stops in front of you shoot him in head then restart last checkpoint rinse and repeat