Prima Games eGuides
primagames.com Browse Redeem a code Help
Mass Effect 3 eGuide
Sign in My Guides

Sign in or create an account

We'll email you a link. No password needed, and if you don't have an account yet, the link makes one.

By creating an account or signing in, you agree to our Terms of Service and Privacy Policy.

Have a password?

Had an account on the old eGuides site, or a code from a printed guide? Help and troubleshooting

Sign in with a password

By signing in, you agree to our Terms of Service and Privacy Policy.

Check your email

A sign-in link is on its way. It works once and expires in 15 minutes. Open it and you're in, with an account if you didn't already have one.

Contents

  • Extras
    • Collectors Edition
      • Mass Effect Inception
      • Q&A: The Art Direction of Mass Effect
      • Q&A: The Writing of Mass Effect
      • What Makes BioWare Tick?
      • Cinematic Design
      • Cinematic Storytelling in Mass Effect
      • Digital Characters
      • Level Design in Mass Effect 3
      • Creature Design
      • The Future of Interactive Storytelling
      • Theme of Survival
      • Gameplay
  • Essentials
    • Introduction
      • Single Player Campaign
      • Intro to Mass Effect
      • Galaxy at War Introduction
    • Special Tactics and Reconnaissance
      • Character Creation
      • Character Development
      • Preparing for and Getting to the Fight
      • The Enemy
    • Armaments and Armour
      • Weapons
      • Weapon Mods
      • Armor
      • Combat and Movement
      • Attacking
      • Powers
    • The Squad
      • Importing Saves
      • Commander Shepard
      • Adept
      • Engineer
      • Infiltrator
      • Sentinel
      • Soldier
      • Vanguard
      • Ashley Williams
      • Edi
      • Garrus Vakarian
      • James Vega
      • Kaidan Alenko (Sentinel)
      • Liara T’Soni
      • Tali’Zorah
      • Familiar Faces
  • Walkthrough
    • Prologue
      • Prologue: Earth
      • Fear the Reapers
      • Prologue - Priority: Mars
      • First Chance for Hope
      • Prologue – Priority: Citadel
      • To the Citadel
      • A Favor for a Favor
      • Dream Sequence 1
    • Act 1
      • Act 1- Priority: Palaven
      • Rescue the Turian Primarch
      • Act 1- Priority: Sur’kesk
      • Host the Summit
      • Free the Krogan Females
      • Act 1: Tuchanka – Turian Platoon
      • Extract Turian Survivors
      • Act 1- Attican Traverse: Krogan Team
      • Investigate Missing Scouts
      • Act 1- Priority: Tuchanka
      • Cure the Genophage
      • Dream Sequence 2
    • Act 2
      • Act 2- Priority: The Citadel
      • Visit the Citadel
      • Act 2 – Priority: Persus Veil
      • Speak With Quarians
      • Disable the Dreadnought
      • Act 2 – Rannoch: Geth Fighter Squadrons
      • Geth Comm Hub
      • Act 2 – Rannoch: Admiral Koris
      • Save the Admiral
      • Act 2 – Priority: Rannoch
      • Reaper Base
      • Act 2 – Priority: Thessia
      • Priority: The Citadel
      • Priority: Thessia
      • Act 2 – Priority: Horizon
      • Investigate Sanctuary
    • Act 3
      • Act 3 – Priority: Cerberus Headquarters
      • Assault the Illusive Man’s Base
      • Act 3 – Priority: Earth
      • Order Fleets to Earth
      • No Man’s-Land
      • Decisions Decisions
      • Heart Vs. Brain (Spoiler Alert!)
    • N7 Missions
      • Introduction
      • N7: Cerberus Lab
      • N7: Cerberus Attack
      • N7: Cerberus Abductions
      • N7: Cerberus Fighter Base
      • N7: Fuel Reactor
      • N7: Communication Hub
    • Side Missions
      • Introduction
      • Grissom Academy: Investigation
      • Tuchanka: Bomb
      • Lessuss: Ardat-Yakshi Monastery
      • Arrae: Ex-Cerberus Scientists
      • Hub Missions
    • Achievements
      • Achievements/Trophies
  • Multiplayer
    • Galaxy at War
      • Introduction
      • Joining and Fighting the Good Fight
      • Before Deployment
      • In the Field
      • Level Strategy
    • The Races
      • Humans
      • Asari
      • Drell
      • Krogan
      • Quarians
      • Salarians
      • Turians
    • The Enemy
      • Cerberus
      • The Reapers
      • The Geth
    • The Battlefields
      • Location: Ghost
      • Location: White
      • Location: Dagger
      • Location: Giant
      • Location: Glacier
      • Location: Reactor

Mass Effect 3 Guide › Walkthrough › Act 2

Act 2 – Priority: Horizon

Cerberus may be using the Sanctuary facility on Horizon as a cover for secret activity. Land on Horizon and search for clues about Cerberus at Sanctuary.

MISSION BRIEFING

Battlegrounds: The Sanctuary’s secret testing facility is comprised of several long, split halls and cluttered with machinery, tanks, desks, and debris for cover.

Aside from the landing zone where you’ll encounter a rival sniper, sniper-proficient players will rarely find an opportunity to use their long-range skills despite the facility’s long hallways.

The facility is full of all types of Reapers, ranging from Husks to Banshees, so you’ll have to use all of your powers and tactical skills equally in order to survive.

When encountering high-level Reaper groups, like Brutes and Banshees, focus on the Brutes first, since they are slower and thus easier targets.

Consequence Overview: As things begin to filter down to a final encounter, all chances to shape the war, gain War Assets, and accrue more Paragon/Renegade points become more and more scarce.

There is only one option for Paragon/Renegade points during this mission. As the final moments of the mission unfold, you’ll have the opportunity to either calmly talk down your prey or threaten him into complying.

ITEMS REQUISITION RUNDOWN

Equipment (x2)

Parts

Inventory Logs

Pistol Scope

M-12 Locust

Research Data (x3)

M-99 Saber

Rosenkov Materials

Medical Station (x2)

Shoulder Guard

Med Kit (x2)

Shotgun Blade Attachment

AROUND THE GALAXY

Mission Unlocks

N7: Communication Hub

Mission Locks

None

WAR PREPARATIONS

Things may not have worked out on Thessia as Kai Leng, the Illusive Man, and the rest of Cerberus threw off your plan.

The fall of Thessia may weigh heavily on your mind, but your goal is less clear than before. Your next step, however, has temporarily shifted away from the Reapers.

It’s clear now that Cerberus will not stop at anything to control the Reapers and keep you from destroying them. The only way to destroy the Reapers is to remove Cerberus first.

CHECK YOUR E-MAIL

You’ve got plenty of motivation to find the Illusive Man, but if you need some more, stop by your private terminal and check your e-mail. You’ve got a very special e-mail that might help light a fire.

SPEAK TO TALI

Stop by the elevator on the crew deck to speak to Tali. Share your thoughts on recent events and let off some steam. She has some words of encouragement that you may want to hear before the next mission.

If you’d like to get straight to the next mission, skip to the “Investigate Sanctuary” section later in this guide.

SPEAK TO LIARA

The occupation of Thessia has been hard on Liara. Stop by her office and visit with her to get her thoughts on the situation.

Listen to her and act on the Paragon decision point in this conversation to ease her guilt.

SPEAK TO ENGINEER ADAMS AND KAIDAN/ASHLEY

Engineer Adams and Kaidan (or Ashley) may also have some insight to share on Liara’s current condition. Stop by the engineering deck and have a chat with them.

SPEAK TO ADMIRAL ANDERSON

Before setting out on the next mission, go to the vid-com station in the war room and speak with Admiral Anderson. He’s got some words of encouragement should you need them.

Keep reading with a free account

The first 3 sections of Mass Effect 3 are open to everyone. An account opens the rest of it, and every other guide in the archive. It's free, and there's nothing to buy.

Bought guides on the old Prima Games site? Your account and every guide you own moved here, so there's nothing to buy again. Sign in.

Create a free account Or browse our free guides

PreviousPriority: Thessia NextInvestigate Sanctuary