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Missions advance the main storyline in Mass Effect , Mass Effect 2 , Mass Effect 3 , Mass Effect: Infiltrator , and Mass Effect: Andromeda . The list contains all of the missions available within the game, and indicates how their names will change as the story progresses. Click on the links below for detailed walkthroughs.

Note: Most mission names below are linked to the relevant section of the walkthrough rather than their own pages. Because of the intertwined nature of most missions, the link may not lead to a section specifically about the mission name but you will certainly find relevant information.

For an alphabetical list of missions see Category:Missions ; for locations see Category:Mission Locations .

  • 1 Mass Effect
  • 2 Mass Effect Galaxy
  • 3.1 Plot missions
  • 3.2 Dossier missions
  • 3.3 Loyalty missions
  • 3.4 Optional missions
  • 3.5 Downloadable Content
  • 4.1 Plot Missions
  • 4.2 Galaxy at War Missions
  • 4.3 Downloadable Content Missions
  • 5.1 Plot Missions
  • 5.2 Bonus Missions
  • 6.1 Priority Ops

Mass Effect [ ]

Missions are listed mostly in the order they are received although some of the name updates happen after you receive another mission. Note that these missions are listed as the initially appear in the Journal , the names of missions do change as the game progresses.

Mass Effect: Legendary Edition Review

25 May 2021

Mass Effect: Andromeda Review

20 March 2017

Mass Effect Galaxy [ ]

The following missions represent the plot progression of the game Mass Effect Galaxy . They are sorted by order even if you can sometimes choose via the Galaxy Map which missions you prefer to start.

Mass Effect 2 [ ]

Plot missions [ ].

These are the missions corresponding to the main story line, in time order (considering the earliest time you can acquire them). To clarify the time line, the main "Stop the Collectors" mission has been divided into its different sub-parts, as they appear when developing it in the Journal .

Dossier missions [ ]

The Illusive Man provides Commander Shepard with several leads on potential teammates.

Available after completing Freedom's Progress :

Available after completing Horizon :

Loyalty missions [ ]

Loyalty missions may be skipped. This will not hinder the progression of the main story line. However, you should be aware that doing this could seriously impact the performance of your team and alter the final outcome.

Optional missions [ ]

Downloadable Content [ ]

Mass Effect 3 [ ]

Mass Effect 3 classifies all journal items as missions. However, they are still categorized according to story relevance and optionality.

Plot Missions [ ]

Missions are listed in the order they are received. The "Priority" missions in this list are mandatory to complete the game; of the two pairs preceding Priority: Tuchanka and Priority: Rannoch you need only complete one of each pair.

Galaxy at War Missions [ ]

None of the following missions are required to complete the game, although they will significantly increase your military preparedness for the final battle.

Downloadable Content Missions [ ]

Mass Effect 3: From Ashes

Mass Effect 3: Leviathan

Mass Effect 3: Omega

Mass Effect 3: Citadel

Mass Effect: Infiltrator [ ]

Bonus Missions [ ]

Mass Effect: Andromeda [ ]

Similar to Mass Effect 3, in Mass Effect: Andromeda all journal items are missions and further classified according to story relevance and optionality. The mandatory missions are called Priority Ops . These are main story missions and are required to complete the game.

Priority Ops [ ]

mass effect 2 main mission order


Mass Effect 2: All Main Missions List

mass effect 2 all main missions

Home » Guides » Mass Effect 2: All Main Missions List

Mass Effect 2 contains many side missions that you wouldn’t want to skip, but what if you wanted the quickest route to the end of the game? We’ve got you covered, whether you’re a newcomer or a returning longtime fan. Here’s a list of all of the main missions in Mass Effect 2 .

Spoiler Warning : Please keep in mind that the names of some of the main missions can hint at some of the story beats in Mass Effect 2

All Main Missions in Mass Effect 2

Mass Effect 2 allows players to complete many of its missions in whatever order they see fit, much like in Mass Effect 1. The following list of missions takes this into account by listing them in the general order that they appear in the story. The game is split up into three acts and several sections. Each section contains a number of individual missions to complete. That includes the highly recommended loyalty missions, even though they’re technically optional.

And that’s the list of every single main mission in Mass Effect 2 . If you’re looking for more tips, tricks, or other general info, check out our guide wiki for Mass Effect Legendary Edition . You can also have a look at our other Mass Effect coverage in the related articles below.

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Mass Effect Wiki

Mass Effect 2 Guide

This page contains a walkthrough for the main missions of Mass Effect 2 . Major changes in the gameplay from Mass Effect are listed in the main Mass Effect 2 page , while the effects of importing a saved game from Mass Effect are listed in the Save File Transfer page. For a comprehensive introduction to the mechanics of the actual fighting the player must engage in on most missions, see the combat page .

Legendary Edition: If you are playing Mass Effect Legendary Edition , all content that was previously available only from Downloadable Content (DLC) is now included by default, but overall requirements and prerequisites for the missions and characters only available from DLC in the original game remain largely the same. Legendary Edition does feature many changes to the original Mass Effect 2, including changes to how certain equipment is obtained.

Prologue [ ]

Prologue missions take place at the beginning of the game, in mandatory progression. At the end of the prologue Shepard receives command of the Normandy SR-2 and is free to explore both the ship and the galaxy.

Prologue: Save Joker - Story and setting

Prologue: Awakening - Create your Shepard, Tutorial

Freedom's Progress - First mission with Miranda and Jacob

Stop the Collectors - Master mission for the rest of the game

Mass Effect: Legendary Edition Review

25 May 2021

Mass Effect: Andromeda Review

20 March 2017

Act 1 begins when Shepard receives the Stop the Collectors master mission along with command of the Normandy SR-2 and continues until the mission to Horizon , which is activated as soon as Shepard has recruited all four of Mordin , Garrus , Jack , and Grunt . Any other missions and assignments not completed during Act 1 can still be completed during Act 2. Note that the order in which squadmates are recruited during Act 1 is entirely up to Shepard and will not affect how events play out in any way.

You will also have the opportunity to perform various assignments —some are available on Omega , some on the Citadel , and others you can discover during the process of Planet Scanning . Assignments described as N7 Assignments usually involve squad deployments and combat—effectively small missions—and provide experience, credits, and other rewards. All assignments are optional, but they help advance the story and provide the opportunity for additional rewards and items.

Act 1 Dossiers [ ]

Perform dossier missions to recruit new squad members for your team. It is recommended that you recruit Mordin first so that you will be able to take advantage of upgrades in the Research Lab on the Normandy. When these four missions have all been completed, the Horizon mission will trigger and Act 2 will begin.

Dossier: The Professor - Mordin

Dossier: Archangel - Garrus

Dossier: The Convict - Jack

Dossier: The Warlord - Grunt

Act 1 DLC [ ]

The following DLC missions and assignments can be performed during Act 1, or saved until Act 2 if desired.

Dossier: The Veteran - Zaeed

Dossier: The Master Thief - Kasumi

Zaeed: The Price of Revenge - Loyalty

Kasumi: Stealing Memory - Loyalty

Firewalker Pack

Normandy Crash Site

Act 1 Progression [ ]

When all four of the original (non-DLC) dossier missions are complete, the Horizon mission will be activated and Act 2 will begin.

Act 2 begins upon successful completion of the Horizon mission. At this point the Normandy is able to travel to Illium and new dossiers and missions become available. New assignments also become available during the course of Act 2: some at Illium, some on Tuchanka , and many new N7 Assignments open up through Planet Scanning in new systems which open up for exploration. New merchants also become available, along with new items at some of the Act 1 merchants; see the Merchants Guide for a complete list of locations and wares.

Act 2 Dossiers [ ]

Four more squadmates can now be recruited, though Legion 's mission works differently in that it does not become available until after the Collector Ship mission, and triggers additional act progression. You will need at least eight total crew members, not counting Legion, to advance the plot.

Dossier: The Assassin - Thane

Dossier: The Justicar - Samara

Dossier: Tali - Tali

Reaper IFF - Legion

Act 2 Loyalty Missions [ ]

Starting in Act 2, speaking with squad members on the Normandy will elicit requests for you to perform Loyalty missions. Securing the loyalty of your squad will both unlock new powers for them and increase the likelihood that they, and indeed Shepard, will survive Act 3. All loyalty missions are optional—they increase the power of your team but are not required to be completed for the game to progress.

Miranda's and Jacob's missions can be obtained immediately when Act 2 begins. Additional missions become available one at a time in the order listed; if the character whose loyalty mission would normally unlock is not yet present (e.g. Grunt is still in his tank, or Thane has not been recruited) then the mission of the next character present will unlock instead. Speaking with Kelly Chambers between missions will let you know which squad members you can talk to for new loyalty missions.

Gaining the loyalty of a squad member unlocks their "Bonus Power" for them to use. The first time a Bonus Power is ever unlocked, it is also added to the Advanced Training list for Shepard.

Each squad mate also has one Normandy Upgrade or research project to unlock in the research lab. Once Shepard has access to the research lab, these can be unlocked, even during Act 1, by talking to the squad members before they offer their loyalty missions and selecting the "[NORMANDY UPGRADES]" option under the Investigate heading; otherwise it unlocks automatically as each loyalty mission is complete.

Miranda: The Prodigal

Jacob: The Gift of Greatness

Jack: Subject Zero

Mordin: Old Blood

Grunt: Rite of Passage

Garrus: Eye for an Eye

Samara: The Ardat-Yakshi

Tali: Treason

Thane: Sins of the Father

Legion: A House Divided

Act 2 DLC [ ]

The following DLC becomes available for the first time when Act 2 begins. These are both large, substantial, and challenging undertakings, and offer significant rewards.

Lair of the Shadow Broker

Act 2 Progression Missions [ ]

Several key progression missions take place during the course of Act 2. Only the Reaper IFF mission may be done whenever you're ready; the other two trigger automatically.

Collector Ship - triggered a few missions after the events on Horizon. See the acquisition section on the mission page for specifics.

Reaper IFF - choose anytime after the Collector Ship mission. However , once completed, a mission countdown activates, with the possibility of significant plot consequences if the player delays much before proceeding through the Omega 4 Relay and beginning Act 3.

Await IFF Installation - triggers aboard the Normandy immediately after obtaining the IFF from the Derelict Reaper .

Act 3, also known as the Suicide Mission , begins when the Normandy enters the Omega 4 Relay , which can be done freely any time after Await IFF Installation is complete. At this point the mission sequence is locked, and the game proceeds through to the Epilogue without any intervening break for Shepard to use the Galaxy Map , complete assignments, research upgrades, etc. If Shepard survives the Suicide Mission, however, additional missions and assignments (DLC or left over from Acts 1 and 2) can then be completed.

Before entering the Omega 4 Relay and thus launching Act 3, you will want to upgrade your ship. The important upgrades are the shields, the armor, and the cannon. Tali, Jacob, and Garrus, respectively, provide these upgrades. For each of these you do not upgrade, you will later lose one team member. Upgrades will also increase the Normandy's value as a War Asset in Mass Effect 3 .

The following list shows, in order of preference, which crew member will die if you haven't upgraded a particular part:

Note: This tier is sorted by the characters' order of dying in descending order. Squad members on the "Multicore Shielding" list will not die if they are in your party when you fight the Oculus . Bringing Jack to fight the Oculus will not protect her if you do not have Heavy Ship Armor, nor will bringing anyone on the "Thanix Cannon" list save them from their fate.

Act 3 Progression [ ]

The Normandy Attacked - Defend the Normandy from the Oculus.

Collector Base: Infiltration - Help your tech specialist through the ventilation shaft.

Collector Base: The Long Walk - Your biotic specialist escorts you through the Seeker Swarms.

Collector Base: Final Battle - Face the truth behind the abductions and make your decisions.

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