We've broken down every act, chapter-by-chapter, to provide you with tips, detail, and general advice for chainsawing your way though the massive waves of the Locust Horde.
Act I: Tip Of The Spear
Chapter I: Welcome To Delta
The Locust Horde is back and meaner than ever, but your first concern is teaching Delta Squad's new rookie the basics of combat.
There are a few advantages to going through the training mode. For one, if you instruct Carmine on "The Golden Rule" you'll have an opportunity to pick up a newspaper in the street for your first War Journal piece. You'll also get a basic rundown of your different combat maneuvers and weapons, as well as the opportunity to blow some stuff up.
Before heading back to the hospital, check the empty room at the other end of the alley. There's a driver's log in the desk along the left wall that you can add to your War Journal.
Chapter II: Desperation
It looks like Jacinto Medical is going to be getting some more patients if the Locust Horde is making rounds. Once you've been debriefed by Anya, head to the next room and meet up with Tai. In the next area, you'll be ready to have your first meeting with the invading Locust.
[Ambush the invading Locust.]
Ah, the visitors are finally here. On Tai's signal, hit the explosive tanks to wipe out the Locust in the first courtyard. Keep in mind that there are quite a few explosive tanks like these littered around the hospital, so be sure to use them if you find yourself in a tight spot.
[Clear the hospital of the remaining Locust.]
Before leaving the left hallway, pick up doctor's journal in one of the rooms occupied by a rustlung patient.
If you take the high path to the right, a King Raven will kill some incoming Locust rushing you in the narrow corridor. Should you chose to go downstairs, you'll encounter some Locust in the far room behind the barrier. Go into the far room and you'll a large pile of ammo near one of the desks.
Once you've cleared the lobby, search the central desks for a medical journal in the middle of the room.
Follow your team out to the courtyard, and a Reaver, one of the Locust's dangerous flying mounts, will attack your squad. You can shoot at it, but it'll run off before you can do too much damage. Don't worry though: you'll seeing more of those things later on than you'll ever care for.
After heading back inside and taking out the Locust in the next surgery room, head into the buffet area, Look for a room to the left with a bookshelf and a desk that houses a COG letterhead for your War Journal. When a King Raven crashes through the ceiling, immediately head to the stairs on either side of the room to outflank the Locusts on the upper floor.
The power will go out at the next checkpoint, so either take the high ground or use the columns for cover against the next ambush until Jack opens the far door. It looks like the rookie couldn't stay behind after all, as Carmine will greet you at the next checkpoint. Reload all your weapons and get ready to step into the firefight outside.
[Clear the streets of the Locust attack force.]
Immediately to the right of the doorway leading outside, pick up a COG Tag for your War Journal.
A King Raven Gunship will help clear the area of Reavers and Locust Drones, but use the cars and debris for covers as needed. Head into the store on the left to get a drop on the next group of Locust, and watch the doorway in case they decide to rush in. (Or, just rush the barricade in the street if you're feeling lucky.)
The chapter ends after the next wave of Locust go down, and Anya will have some bad news for Dom regarding his missing wife — poor guy.