Act 4: C4 - No Turning Back

Some lancer ammo, then set up your mulcher on the left side as you prepare for four reavers to charge at you. After that, look to the front of the thing for another lift and spend the rest of your mulcher attacking the guys on it. Toss frags when it's close and clear it. Jump over to that lift and press the button at the back. Now a reaver comes in to the right side, so shoot your lancer when it's within good range. One more from the same side and then you are free.

Get off the lift and head left. To the left of the stairs is some ammo and then go up and to the left is a calendar to look at. Go down the stairs and you'll see a group to the right. You can go left for ammo and then snipe from here, taking out the Kantus first. After that, head over there and grab the ammo. Press the button and you have a choice to man the turret or take the stairs. Despite what seems the better choice, take the stairs.

Go down and you'll see an ammo box, but go past it and use this perch to help take out the enemies below, then grab the box. Go down and around and pull the lever. Around the stairs and take cover from the boomers, and again take out the Kantus priest, but watch out for his tickers from your back. You can get the boomshots if you want to. Go around to the side and pull the lever, then down the stairs to use this perch to take out the final group of baddies. After the fight, wait for the door nearby to be opened by your team and then go through.

Head to the next area, ammo box at bottom of steps, and start firing on the bad guys below. To the right of the door are frags, then go to the right side of this room for ammo and some plans on the ground. Pull the lever here and the cover below will fall, and some stairs nearby will start to rise up. Take them down and head for the middle of the room. After the scene, run to the right and take cover behind the blocks in the wall and snipe the grinders - some serious doors for two grinders. A smaller door opens on the side of the room and a guy will run out. Pick up whichever mulcher you think has more ammo and head through that door; you don't really need a mulcher, but if you can manage it you should take one.

In the next fight your guys can handle it, as the mulcher can't aim down, and by the time you haul the thing down below the fight should be over, so helping is optional. Head through the door at the back and when you get to the bottom look right for enemies to pop up. You can back up a bit and take cover from the ramp at the entrance, or set up shop and start mowing down enemies if you brought a mulcher. Sadly, there are so many strong enemies you may be too slow with that gun, so drop it if things get too hot for you. All you have to do is kill all the enemies, and if you do so before anyone dies the chapter will be over.

*NOTE: The new enemy types are called Palace Guards, FYI.*