How do you beat the last boss in gears of war

Ok i had my Gears of war game on my xbox360 and finished a kouple of times.


Firstly The last chekpoint before you meet the General RAAM there is some torque bows and some ammo,a lancer,and a sniper rifle and ammo.grab the lancer and max up your ammo then grab the torque Bow leaning against a wall oppposite of the longshot(sniper)
then go through doors.immediately take cover and tell Dominic santiago to "Take Cover"
in the commands screen or else he'll kill himself and might die after a while,if you do not rescue him which you can't do because the General Raam Boss has a portable troika and you will die easily if he tries to shoot you.
so as i was saying take cover and see how there is a shield of Kryll around him?
he is invulnerable during the time they are around him so take out your torque bow and aim at body.the kryll must be gonew now so take out your lancer and shoot[shooting the head or body will be most effective] till his Kryll come back.Repeat process a few times and watch out for reavers on the side and also stay in the light most of the time because every now and again Flkocks of Kryll from the sky will kome and attack you.
and one more thing every time you shoot and shoot at the boss he will move closer and closertill he gets to your spot so i suggest roadie run to other side and wen he comes bak that side go bak to ur original place.

something That will also help kill him is wen he gets near you melee a grenade onto him
about three will kill him
but watch out! he will try to kill you and kome around to ur side of your hiding spot!



Using this Method It may take 2-3 tries but in end you will get it.

NOTE:This Was for casual difficulty hardcore is harder and more twists and insane is near impossible if u try it!

Unknown Hope This helped!!!