Important Assignments Mass Effect

This is a brief guide intended to outline a reasonable order to complete 100% of all missions and assignments. It covers experiencing virtually all of the content of Mass Effect.

There are a number of other excellent achievement specific guides listed below. These should also be consulted for specifics concerning those achievements.

Note that this is not intended to be a walk-through in the usual sense: it is more of a checklist. It is not necessary to complete the game more than once to gain the "Completionist" achievement.


This checklist will provide one possible order for accomplishing all of the missions and assignments.


Exposing Saren

Note: Avoid triggering any assignments!

Finding Liara T'Soni

Note: If you are already at least level 20, it will be impossible to avoid triggering the UNC: Rogue VI assignment at this point. This will not adversely affect the ally achievements, as only 75% of the assignments are necessary.

The Citadel



Uncharted Space

The Citadel Redux

Uncharted Space Redux

Note: This is the final opportunity to complete assignments outside of the Citadel.


Citadel Detainee


Multiple Characters and Replays

In order to experience every possible assignment and to gather all possible achievements, it is necessary to play through Mass Effect at least four times. If one follows the possible career paths:

  • the first game will yield all but three of the assignments and the majority of the achievements;
  • the second will yield a few further achievements;
  • the third will provide two further assignments and several more achievements;
  • the fourth will see the final assignment and finish up the last possible romance combination.

Further replays may be required to gain the Extreme Power Gamer achievement and/or the various talent achievements.

Character Creation

When creating a custom Commander Shepard, several immutable characteristics must be chosen which will affect all future play using that character, even if a new game is started.

The default "quick start" Commander Shepard is a male Soldier, Earthborn, and a Sole Survivor.


Morality affects certain dialog choices available during each game (and therefore the outcome of certain assignments) as well as a morality-specific mission. A character's morality is represented by running tallies of Paragon and Renegade points (to a maximum of 330 each). Accumulating Paragon points unlocks higher levels of the Charm talent; Renegade points unlock Intimidate levels.

When starting a new game, Paragon

Missions are quests that advance the main storyline in Mass Effect, Mass Effect 2, and Mass Effect 3. 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.

See also: Assignments, Mass Effect Guide, Mass Effect 2 Guide, Mass Effect 3 Guide, Mass Effect System Guide, Storyline

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

Mass Effect Edit

See also: Mass Effect Guide

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.

→ Feros: The Thorian → Feros: Colony Saved | Feros: Colony Gone
→ Virmire: Assault
→ Race Against Time: Sovereign
→ Race Against Time: Conduit
→ Race Against Time: Final Battle

Mass Effect Galaxy Edit

See also: Mass Effect Galaxy Guide

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 Edit

See also: Mass Effect 2 Guide

Plot missions Edit

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.

→ Prologue: Awakening
→ Stop the Collectors: Defeat the Collectors
→ Collector Base: Infiltration
→ Collector Base: The Long Walk

Dossier missions Edit

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

Available after completing Freedom's Progress:

Available after completing Horizon:

Loyalty missions Edit

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 Edit

→ Illium: Liara: The Observer

Downloadable Content Edit

Mass Effect 3 Edit

See also: Mass Effect 3 Guide

Plot Missions Edit

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 Edit

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 Edit

Mass Effect 3: From Ashes

Mass Effect 3: Leviathan

Mass Effect 3: Omega

Mass Effect 3: Citadel

Mass Effect: Infiltrator Edit

See also: Mass Effect: Infiltrator Guide

Plot Missions Edit

Bonus Missions Edit


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