Combat Leapfrog Trophy in Uncharted 3: Drake's Deception

This one should be obtained during Step 1 of the Road Map as there will not be too many opportunities when things get harder for your Crushing playthrough.

As the description states, you need to get 10 kills by alternating between melee kills () and gun kills (). Once you kill an enemy with a gun, the next must be from a melee attack, then back to guns and so on. A couple of things to note are that armoured grunts cannot be melee attacked until their helmets are blown off which is a risky strategy in itself as keeping the fire button held down will kill them with gunfire and blow your count. There's also more than enough locations where distanced enemies can only be shot at, forcing you to gun them down and can compromise your chain. It is a good idea to get trophy out the way earned early in the game, as it will be too soon for the appearances of armoured bad guys and sighted enemies with power weapons. As such, below are a couple of prime locations to farm this one and you can restart any of these checkpoints if you need to:

Chapter 5 - London Underground

You will begin to encounter larger groups of bad guys after you exit the library and head back through the station. There are many enemies and they tend to spread out making this easier. Take cover and shoot one guy, then one should approach your position, come out of cover and melee him quickly. Do this as you get through the station and you should have this quite quickly. You can die in between kills and not break the sequence but should Sully steal a kill from you which he likes to do, then just move on and continue the streak on the next bad guy.

Chapter 6 - The Château

Right after the Grenade tutorial on this chapter you will advance to an external area with a gunfight already unfolding below. This area is perfect for this, there's lots of space but it's littered with cover spots, a very good stream of enemies and a Wes Revolver down on a crate just down to the left from where you start which can one shot kill anyone in this part of the game. Duck in and out of cover and stay on the move, melee killing one guy in the courtyard area before killing one of the dudes that shoot from high up in the rafters the overlook you.

Remember, checkpoint restarts are ok for this trophy and dying won't hinder your progress, providing you alternate one for one in sequence.

On the 10th successful kill, your trophy will unlock.