Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Aerial Ballet (Silver)	While flying a jetpack, kill an enemy (who is also flying a jetpack) with any weapon other than the Rocket Launcher.
Are You Aim-Botting? (Silver)	Snipe an enemy who is flying a jetpack.
Safety Violation (Silver)	Kill a distant enemy from on top of the salvage crane in Tau Crater.
That Was Some Bug (Gold)	Kill an enemy who is flying a jetpack by hitting him with any vehicle or aircraft.