transformers : revenge of fallen walkthrough 4

act 4 level one : starscream's path
now you control starscream again in jet mode to wipe out the military base's defences so megatron can go in and take the artifact. when you're landing in the first boat, evade as fast as you can from the cannon and then destroy the army. next in jet mode, you'll have to evade many times (press the circle button while moving) because there are many rudals come to you. then an autobot captain will come, destroy him by shooting him continiously. this is the iritating part because he will always switch side between your back and front side. then you'll come to a bridge, destroy it. then go ahead, but watch out from getting hit by the buildings or cannons. next desroy the turrets, fly up again, then evade from a beam. shoot the 3 cannons which shoot you with the beam. for the easier way, lock the target, hold the r2 button, then rotate the left analog stick.

act4 level two : megatron's onslaught
as soon as you start, many autobots come to you. shoot the one in the towr first to make this easier. then go ahead, turn left, watch out for the cannon. after you destroy it, turn right. you'll come to a bridge. use the block thing as a shield while you shoot the autobots, tanks, and cannons. jump the building because you're not fit in the underway. next turn left, go ahead to the demolished bridge. go up to the dam. wait until starscream use his missile to close the water gates. then four autobot armies will come. destroy them so you can go ahead. then wait starscream again, go ahead to the pipe an then turn left. many autobots and tanks there. destroy tem, then go to the upper side. next demolish the battleship so the gate will be opened.
as soon as you come in. many autobots will surround you. press down button quickly! then follow the way and beat any enemies you see until you are being locked down. ignore the coming autobots, keep shooting to destroy the iron gate. then use the lift. destroy 2 autobots captain, use lift again more autobots, destroy them, then lift again. shoot the autobots while you still on the upper side. there were 2 minigames to unlock the security systems if you had time, if not, just skip by press the select button. (you only have 30 seconds to take the artifact, too much time i think) then go back. when you're locked again, use the narrow way. just hit the pipes to make the way larger. when out, you wee in the edge of the building and there are an autobot captain, so be careful. after you beat him, starscream will come

act 4 level three : jetfire's gift
i can't tell you much about this level because there were not much to tell (:P). just follow the way, beat any enemies (a difficult one, because jetfire has no attack speed but his attacks will make a great damage) to reach the place optimus has landed.