Yep, old stomping grounds. This area is now flooded, but you can walk on water,
or ice I suppose. Move up and into the building for your own cover. Now your
team will go out to die, so there’s little you can do. But from here you can
pick off the turret gunners, an enemy with a cannon to the right, and pick off
ghost driver so you can ride in it. Use the ghost to clear the enemies at the
other end.

Then move up to the scorpion ahead. Jump in and let your buddy get on the
turret. You control the cannon, so test it on the enemy platform. More
tangos around the corner, and just know that well-placed shots are better than
inaccurate fast ones, for the most part.

Head up the slope and you’ll see AA guns online. Move up and hit the enemies,
then the ghosts, and some banshees that are hard to anticipate. Then just
start pounding the turrets as they will explode from your cannon fire.

Once down, you get some air support so help them clear out the skies before
moving on. Head down the path for some ghosts and a platform. The slope
heading to your target is covered with vehicles and turrets. The turrets are
top priority, especially the one up on the cliffside, it’s very deadly. Get
the other turret at the back and then climb up the hill to the gate.

*

Get out and run in. Elites meet you while the smaller minions are handling
nearby friendlies. The path to the lower level will open with more elites and
turrets down below, but you need to go left to wash up the enemies or your
team won’t proceed, so get any covenant up here before going down low. Pop the
turret gunners, then take one with you.

Head up the path and use the turret to plow into the next room, which has
many levels and lots of jackals crawling around. Just move slow, maybe use
that hologram power (sends a ghost of you as a decoy) and you can get to the
top.

Grab a DMR and move to the other end for the dark path. Toggle vision and
move through the familiar grounds to emerge at the foyer. Just a few elites
roaming, with most cloaked to eyes sharp. Your hologram is a nice tool here
to draw them out, and especially clever on the zealot that appears on the ramp
in the right corner. Take him out, move into the room, maybe an enemy in here,
and open the door for a scene.

*

Move up and get ready to turn on four turrets in the area. The lab is to the
left, and all you really need to do is survive the duration, which is about
a good 4 minutes if not longer. The turrets recharge when they take too much
damage, and you can see all their health bars on your screen. So it’s
advantageous to help them mow down incoming, at least early on.

About when the ghosts show up is when you should fall back to the door and
stay there. You got grenade launchers on the sides, a spartan laser (aim, hold,
fire), and even a rocket launcher here to help you defend. The latter waves
are mostly elites, with the final wave having enemies with those big cannons.
Just stay mobile, more around, and use your hologram. Don’t worry about the
ghosts or wraith, they are really just traps. When the phantom shows up is the
best time to use your spartan laser and rocket launcher, to attempt to blast it
away. Soon after the doc will be done and you can open the door to enter.