6. Baptism by Fire

Breach the door and proceed forth while clearing the area. As you reach the tunnel, more enemies will emerge. Take cover and ambush them before they get to cover. Follow the tunnel then make your way to Salem's position to help him up. After the scene, you'll have to choose whether you'll protect Rios or rescue the hostage.

Rescue the hostage:

Run to the next cover and take out the enemies in sight before entering the building. Move carefully and take out the enemies along the way. Continue until you reach the MG emplacement. Kill the gunner then use the MG to provide cover to your partner below. After taking out the enemies, some of them will continue pouring in but your mission objective will be updated.

Leave the MG and breach the door behind you. Make your way upstairs to find Fiona then wait for the chopper to arrive. Lift the hostage to the chopper and you'll have to provide covering fire to your allies below using the sniper rifle onboard the chopper. Kill the enemies until you successfully extract Rios and your partner and the chapter will be complete.

Protect Rios:

(Warning: When playing solo, your AI partner may have a dumb moment where he'll just stay in cover and refuse to continue forth. When this happens, restart the checkpoint.)

Stay in cover near Rios and assist your partner as he moves to the building. Once he's inside, find an indestructible cover and fire only when the MG is not aggro'ed on you. Once the gunner in the MG has been taken out, your partner will provide covering fire. A technical will arrive so focus your fire on it and once it crashes nearby, get behind it and use the mounted grenade launcher. Take out the RPG trooper to the right as well. Continue killing enemies with the help of the grenade launcher until the evac chopper lands. When it does, leave the vehicle to end the chapter.