Part 26

After an explosion, melee the doors and a Marine will inform you that creatures are aboard.

Make your way up the stairwell to the engineer.

He will explain that you must disable the main breakers to begin a reactor shutdown.

Go through the hatches, down the stairs, and through the water.

The breakers are up the stairs to the left of the blue hatch. Go up and disable them.

Go down the stairs and through the partially flooded hatches, entering first through the blue hatch, to initiate the SCRAM sequence on the reactor.

Power-jump the wall and go through the breach.

Enter a service duct via a ladder.

Crouch and take the duct, then jump down and hit the red button on the control console to initiate the SCRAM sequence and insert control rods.

When several rods jam, squid will pour into the chamber.

Helena will use your nanosuit to transmit a signal, and an overload will kill the aliens.

Get into the reactor room to push down the three rods. Activate armor and interact with the rods to avert a meltdown. Move quickly, interacting as fast as possible with each rod and then get out; you don’t have to wait for them to go down before going to the next rod.

Another wave of hostiles is inbound; follow the green-lit doors.

Make your way with armor active past the generator to the stairwell.

Jump onto the generator housing to minimize your time in the electrified water.

The green doors will lead you past Admiral Morrison and to the partially submerged hangar.

After starting for the ammo elevator, several squid will attack. Kill them, using the doorway to restrict their approach angle. The Gauss Rifle yields single-shot kills.

Take the ammo elevator to the storage hangar.

A half dozen squid will attack; lure them out and retreat to near the elevator to restrict their attack options.

Make your way across the storage room and into the adjacent room where Marines are battling squid.

Help them eliminate the horde and exit the hangar to the northeast, following the green doors.

When the abandon ship order is given, continue forward.

Kill the squid coming through the breach.

Before going for the flight deck, go up the stairs and follow the “Armory” signs to get the TAC cannon, a special weapon that doesn’t replace primary weapons. Several squid will attack on the way.

Follow the green doors, fighting your way through corridors.

Grab Gauss ammo from the counter on the left.

Continue through smoky corridors and past Admiral Morrison, who is being assailed by squid. Help eliminate the squid, but the Admiral does not survive.

Just before getting onto the flight deck, top off your Gauss ammo from the counter to the right.

Activate cloak, get on deck, and grab ammo for the minigun, a missile launcher, and anything else you need. A Gauss Rifle is available to the right of the hatch if you don't have one.

A gigantic, scorpion-like alien “tank” appears on the flight deck. It does not move from its starting position and can spew ice shards and broadcast a fatal concussive blast if you are exposed.

Move north and get behind the wrecked VTOL for shelter from the tank's attacks. The left end of the wreckage provides the best protection on higher levels.

Deal initial damage to the creature with the missile launcher from behind the VTOL wreckage.

When the tank opens its glowing “mouth,” activate armor and duck for cover (press the cover button to crouch behind walls or objects) behind the VTOL.

Let your energy recharge, equip the minigun, and attack its “mouth” for increased damage. Activate armor and move into cover when it attacks.

Flying squid will join the battle one at a time. Take them out with the Gauss Rifle. Use cloak to get a bead, using the VTOL wreck to shield your position, then de-cloak to save energy for your shield and attack the flying squid.

If the tank deduces your position, it will fire its MOAC from above.

Continue to punish the tank and re-supply Gauss and minigun ammo from nearby caches. Alternate squid control with minigun fire, armoring in cover during its attacks.

Stay away from the tank's corpse as it will explode massively.

Re-supply everything in your possession, including your missile launcher.

Make your way back to the VTOL wreck and prepare for battle.

An enormous alien warship approaches the carrier. It has four canon ports at its corners that must be destroyed to allow Helena in the VTOL to approach and take down its shields. These canons appear as closed alien eyes and open to fire ice shards.

Use the edge of the VTOL hulk as cover. Fire a Gauss round into the warship. When the shutter over a canon port opens, hit the canon with Gauss rounds.

The warship projects frigid blasts that obscure vision, making you susceptible to enemy fire. Wiggle the analog stick to free yourself.