After the opening cutscenes, you'll be in control of your group, Overstrike 9. You'll be facing off against an Enforcer, but you can't defeat it, so just fire on it until you head inside the compound. On the right side of the room will be some gold bars, which are Fuse Credits. These allow you to buy Team Perks, so make sure you always look out for them when exploring the environments.
Approach the dead body on the floor and pick up the first piece of INTEL, then head over to the door and interact with it to lift it open. You'll see some turrets in the next room with lasers, so go off to the right and access the panel to disable them. There will be more Fuse Credits off to the left of the now open doorway.
On the left side of this room is a closed door and you'll find an XP Pickup sitting there, so pick it up. Head into the decontamination chamber and hack the console to open the door. Take cover and wait until things die down, then head inside the room ahead to find another INTEL on the ground on the right side. Head right through the next door and you'll find more Fuse Credits on the opposite side of the room.
Access the panel to blow a hole in the wall, then go through it and into the hallway beyond. Stay back until the explosion happens and then go into both side rooms to find more Fuse Credits and another XP Pickup. Go through the next door and a cutscene will occur, with your team getting their Fuse Weapons. Head on over to the shooting range to test out your weapon, then head to the opposite side of the room to find INTEL #3 sitting on a desk.
If you pay attention to the bottom of the screen, you will see that you can use the Leap System to change characters, so make sure you use it to test out the different characters. As you go into the next hallway, some small enemies called Seekers will show up. One of the easier ways to get rid of them is by using Dalton's Magshield's secondary fire.
| The Leap System allows you to switch between AI characters, making it so you can use the different characters. This makes it so you can access the other characters' Fuse Weapons and their abilities, letting you adapt to the situation on hand, as well as possibly choosing a favorite. |
Once they're all dead, feel free to check the side rooms for ammo, then go to the right hallway at the end for Fuse Credits. Go into the next room to find more turrets, where your teammates will temporarily disable them until you can access the panel to shut them down. In the next hallway, the Enforcer from the beginning will show up, but you don't have to fight it.
Talk to Senator Fable behind the glass and he'll open up the way for you. Check the side rooms for more Fuse Credits and another XP Pickup, then keep continuing forward until you have to pry a door open. A cutscene will play out and you'll have to fight some Raven soldiers. In the next room will be even more Raven soldiers.
Keep pressing forward and when you get to the end, hang a right and go out onto the walkway to fight even more soldiers. Shoot at the chopper to take it down, then mop up the rest of the soldiers. You'll find more Fuse Credits and another XP Pickup on the platform. Continue to the next waypoint and through the door, picking up the XP Pickup on the left, then breach through the cracked wall.
In this room, feel free to switch your Normal Weapon out for another, then go through the next doorway. Look to your right to find more Raven soldiers, so take cover and start firing. Go to the next room and you'll find some more weapons for switching out. The next room will be a fairly open space, and you'll fight some more Raven soldiers, as well as some Seekers.
When you kill them all, go to where the soldiers were and you'll view a short scene with some Snipers appearing. Take them all out and climb the stairs to view a short scene with a Leadfire being dispatched. This one has a flamethrower and its weak point is the tank on its back, so keep firing at that spot. Take the Incinerator it leaves behind and toast the enemies inside the elevator, then take it.

