G.I. Joe: The Rise of Cobra

You must get a G.I JOE ranking on every mission to get all 5 battle points from each mission. It may take you several attempts to get the highest ranking on some levels. You must kill every enemy, shoot all Point Clusters, and pick up every Point Multiplier. To get Point Multipliers to spawn, simply inflict lots of damage without taking any damage. Only use permanent cover, do not take cover behind any of the destructible covers. If there is not permanent cover just keep moving and rolling back and forth to avoid fire. Shoot enemies from a distance. Use your accelerator suit (Go Joe) whenever you can. To charge Go Joe quickly, inflict lots of damage without taking any damage. Sound familiar?

I'm not exactly sure if you have to kill 5 enemies without taking damage in order to get the x5 multiplier to appear but it will always come shortly after the x3 if you continue to do well so I think that's the deal. Also, launch enemies into the air when you can in order to earn extra points, and help build up multipliers. Use Go Joe to maximize multipliers and help ensure they spawn (you can't take damage while accelerator suits are activated). USE RIPCORD. He is the best character in the game and his special (a turret) can really rack up the points if you deploy during a multiplier. This one will take some practice. You will want to earn this trophy on Hardcore Difficulty because of the following:

Casual Difficulty - You will be DISQUALIFIED from earning the highest ranking on Casual.

Advanced Difficulty - You will receive a 15% score bonus for completing the mission.

Hardcore Difficulty - You will receive a 25% score bonus for completing the mission.

Since most high scores are well over 400,000, you will get at least 100,000 extra points for Hardcore Difficulty on almost every mission. It is easier to get high scores with two players (more multipliers) but it's more difficult to live through the mission because you cannot spread out and you cannot switch characters to save yourself. I found it almost impossible to beat the later missions on Hardcore with two players even though I breezed through every level of Arctic with a friend. You will lose points if a character dies. You must also purchase every contact (G.I. Joe & COBRA). This trophy will pop upon completion of the requirements.

Here's a heads up from AUSPUFF. Thanks PUFF!

By the way, you do not need to get a 5 badge rating on all the levels for the Battle Master Trophy. You only need enough to be able to pay for all characters and there are about 8 levels that you can skip, if you are having trouble.