Defeat a soldier using the UnibeamThis can be done on First Flight or any mission after. Kill all the enemies but one guy then land and charge an unibeam by holding down RB. Then unleash it on an enemy. Does not have to be full power just needs to be held down for at least a second. Make sure to aim straight at the enemy and be locked on before releasing. This has to be a foot-soldier, not a truck or helicopter.