Defeating General Raam:

Once you reach General Raam at the end of the last Act, he will have a Gatlin type gun and will be surrounded by the bird locust. There will also be flying locusts attacking from the side of the train (ignore them). You can only damage General Raam when the bird locusts leave him and go after you. Stay in the light or the birds can kill you. When you start fighting him, hide behind the first rectangular block that is directly in front of the doors you came from. He will start walking towards you and shoot. When the birds leave him, start shooting. After a while he will get directly in front of where you are hiding. When he does, run around him and hide on the other side of the platform. Stay in the light as you run. Hide, then continue shooting him until he dies.

Get General Ramm off the Gatlin gun. When he starts walking towards you, let Dominic get his attention. Then, run towards the Gatlin gun and shoot him with it. This should kill him in seconds. This is easier in Co-Op mode.

If you are having trouble accessing the second Troika-gun, try the following specific gun-combo. At the beginning of the level, ensure that the Lancer Rifle and the Torque Bow are in your inventory. Collect the extra ammunition from the train car and enter the next area. When the intermission scene ends, proceed to the vault over the cement slab. Enter cover behind any of the cement blocks. You must hit Raam with the Torque Bow to drive off the Kryll. When they fly away, immediately switch to the Lancer Rifle to execute as many headshots as possible. This may require at least a clip of ammunition each time. When the Kryll regroup, reload the Lancer Rifle immediately, and switch to the Torque Bow. Depending on various timing-issues, Raam will advance to your location, requiring that you use the "switch cover" action to force Raam to adapt his path-finding. Whenever Raam's AI pauses to change direction, repeat the use of the Torque Bow/Lancer Rifle combination. This method may require at least five combos to defeat Raam. If you run out of Torque Bow arrows, the grenades may be used as a means of "scaring off" the Kryll.