[Primary Objective: Move Anders to the other bridge's control panel]

It couldn't be that easy, right? Since the Grunts blew up the bridge controls leaving you without a means across, Anders tells you to try hacking the bridge using a different control panel. Take your units to the bridge on the right. Along the way, destroy the tower using your Grizzlies. Select only Anders and direct her to stand in front of the control panel so she can begin hacking it.

[Primary Objective: Cover Anders as she hacks the bridge controls]

All you need to do is ensure that no Covenant reach Anders in the minute it takes for her to hack the control panel. Keep your units near her, blocking the path to the control panel with them. There's no need to issue orders to attack specific units; instead, just let your guys attack the most immediate threats and it'll be over soon enough.

Stroll across the newly hacked bridge with your forces. Take out the throng of Covenant on the other side, including the armor. Remember to leverage your Grizzlies for their firepower, particularly against the Hunters. You want to make your way to the structure's entrance, returning to the T-junction and heading topside. As you near the entrance, however, a bunch of panels burst to reveal a dozen or so Hunters. Eliminate them as quickly as you can. Remember those Marines that you couldn't select earlier in the mission? They now come charging in to help you beat back the Hunters. Just in time too because you have a new objective.

[Primary Objective: Get Forge and Anders to the marked landing zone]

All you have to do is instruct Forge and Anders to exit the structure and walk up to the marked landing zone to complete the mission.

Optional Objective: Kill 45 Hunters

You should get pretty close to completing this optional task by simply working your way through the primary objectives. If you make it to the final primary objective without having killed enough Hunters, hang back with your forces and take out Hunters before arriving at the landing zone. The Hunters near the structure's entrance spawn, so you can just camp there and kill as many as you need to complete the objective.

Optional Objective: Use the bridge to kill Covenant units

After Anders finishes hacking the control panel, hover the cursor above it and wait for Covenant forces to appear on the bridge. Access the control panel with the A button and then deactivate it to kill the enemies. Along with completing an optional objective, it also nets to an achievement.

Black Box--Turn around at the start of the mission and order your Grizzlies to take the path angled to the west of the structure's entrance. Follow the path until you reach a downed Pelican next to which is the box.

Skull--At the end of the mission when you've killed 45 Hunters, take a Grizzly back to the other side of the structure. The skull is resting on the platform at which you rescued Forge and Anders.

Click here for our Act I Walkthrough. .