What can you do as a free member?

Member benefits illustration

Create your free account today and unlock all our premium features and tools to enhance your gaming experience.

Member benefits illustration

Create your free account today and save articles to your watchlist and get notified when they're updated with new information.

Member benefits illustration

Create your free account today and save your favorite games for quick access later, synced across all your devices.

Member benefits illustration

By creating a Game8 account and logging in, you'll receive instant notifications when someone replies to your posts.

Comment rating feature illustration

By creating a Game8 account and logging in, you can make use of convenient features in the comments section, such as rating and sorting comments.

Premium archive feature illustration

By creating a Game8 account and logging in, you can access Premium articles that are exclusively available to members.

Site Interface

Guest
Free Member
Article Watchlist
Game Bookmarks
Cross-device Sync
Light/Dark Theme Toggle
User Profiles
Direct Feedback
Comment Rating

Game Tools

Guest
Free Member
Interactive Map Access
Interactive Map Pins
Interactive Map Comments
Interactive Map Pins Cross-Device
Check List
Event Choice Checker
Deck Builder Cross-Device
Message Board Notification
Message Board Cross-Device
Build Planner
Stat Calculator
Diagnostic Tool
Weapon/Armor Wishlist

Want more information?Learn more

Call of Duty Modern Warfare 3 (MW3)

Two Factor Authentication Walkthrough

Add to Watchlist

Two Factor Authentication is an Act 3 mission in Call of Duty Modern Warfare 3 (MW3) Zombies. Read on to learn more about Two Factor Authentication objectives, and Two Factor Authentication rewards!

Two Factor Authentication Walkthrough

Two Factor Authentication Objectives

1 Complete a Defend Ground Station Contract
Defend Ground Station contracts are marked on the map with a skull shield icon on a blue cellphone. Players will need to collect data from seismic refractors before starting the defense part of the contract.
▶︎ How to Complete Defend Ground Station Contract
2 Kill 20 Mercenaries during the Contract
Mercenaries will drop from time to time while the computer uploads data. A good way to hunt for mercenaries during the contract is to keep an eye on smoke screens in the surrounding area, these are where the mercenaries drop to halt the upload.
▶︎ Zombies Best Guns and Weapons Tier List
3 Maintain the computer's health above 60%
In our experience the main threat with this contract is the shielded mercenaries as they protect other mercenaries from your shots and breach through your defense. Take the shielded mercenaries out by throwing a Semtex at them or flanking their exposed areas.
▶︎ List of All Zombies Gear
4 Exfil with the Death Perception Recipe
The Death Perception Recipe will be inside the reward rift once the contract is finished. To Exfil, look for the icon of a person stepping out of a doorframe. You can exfil by successfully boarding the exfil helicopter after calling it and defending the landing zone.
▶︎ How to Exfil

Invite Other Players to Defend the Computer Easily

Having other players for this mission is extremely helpful as they can ping the mercenary drop points while defending the ground station. Your teammates can also be assigned to defend each side where mercenaries might come from.

Two Factor Authentication Rewards

Two Factor Authentication Rewards
Flawless Aetherium Crystal x1 3000 XP

List of Aetherium and Aether Tools

Call of Duty Modern Warfare 3 (MW3) Related Guides

Modern Warfare 3 - Zombies Game Mode

Zombies Mode Walkthrough and Guide

All Zombies Guides

Zombies Guides and Lists
Zombies Missions Zombies Season 2
Zombies Season 1 Zombies Map
Zombies Weapons Crafting Schematics
Aetherium Challenges and Enemies
Zombies Perks Zombies Ammo Mods
Zombies Field Upgrades Zombies Gear
Contracts Zombies Power-Ups

All Zombies Acts 1 to 4 Missions

Missions
Direct Line Treasure Hunter
Road Rage Wall Power
Firepower Take Up Arms
Interceptor Freezer Burn
Minelayer Pit Stop
Saboteur Automated Backup
Infiltrator Hands Off
Blasted Bring 'Em On
Hostile Takeover Chaperone
Nest Wrecker Where's Dr. Jansen?
Extraction Same Day Delivery
Safe Cracker Ascension
Merc Cleanup Reaper
Guardian Angel Shocked
More Firepower Bounty Hunter
Essence of Aether Heist
Mind Control Frost Bite
Exterminator Shepherd
Two Factor Authentication Firestarter
Ghosted Alternate Current
Most Firepower Paint the Target
Crash and Burn Storm the Castle
Closing Time Spring Cleaning
Holdout Defeat Zakhaev
Bad Signal Countermeasures
Union Ascension (Story Mission)

Author

    Please participate in our site
    improvement survey
    12/2025
    Would you assist in
    improving Game8's site?
    ×
    This survey will take about 1 minute.
    Your answers will help us to improve our website.
    We are listening to our users' valuable opinions and discussing how to act on them.
    The information collected through this survey will be used for the purpose of improving our services. In addition, the information will only be disclosed a part of a statistic in a format that will not allow identification of personal information.
    Begin Survey

    All rights reserved

    Guide Index