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On Steam, 76% of 2,154 player reviews are positive (Mostly Positive). 33 people are playing it on Steam right now, with a peak of 75 in the last 30 days. Valve rates it Unsupported on Steam Deck. The main story takes about 18 hours, doing everything about 56 hours. It was nominated for 1 award.

Mass Effect 3 is an action role-playing game in which Commander Shepard leads a final campaign against the Reapers, a machine race that has invaded Earth and is conquering civilizations across the galaxy. Players recruit squad members from various species and classes, forge alliances, and make choices that determine which characters survive. Combat features squad-based tactics with combinable biotic and tech powers, blind fire, and enhanced melee attacks. The game includes a cooperative multiplayer mode where up to four players fight waves of enemies to liberate conflict zones. Progress in multiplayer contributes to war preparedness in the single-player campaign. New and returning squad members join Shepard's team, including soldier James Vega and EDI, an AI in a physical body.

Story

The Reapers invade Earth and quickly overwhelm its defenses. Commander Shepard escapes and is tasked with rallying the galaxy's civilizations to build a united military force and complete the Crucible, a Prothean superweapon that may be capable of stopping the Reapers. Old conflicts between species must be resolved before any alliance can hold. From curing the Krogan genophage to settling the Quarian-Geth war, Shepard must broker impossible alliances while Cerberus, a human supremacist organization, works to undermine the effort at every turn. The fate of the galaxy depends on the strength of the force Shepard can assemble and the choices made along the way.

What is happening now

Mass Effect 3 is BioWare's action RPG conclusion to the original trilogy, blending shooter combat with dialogue-driven storytelling and strategic squad-based encounters. Released in 2012, it sent Commander Shepard on a final mission to determine the galaxy's fate through a series of pivotal choices. The game remains a point of discussion years later, particularly around its ending sequence and the multiple paths players could take to resolve the conflict. Coverage continues to highlight standout character moments, including notable relationship developments among the Normandy's crew and what many consider memorable dialogue from the campaign's climax. The trilogy's branching narrative choices and their consequences continue to resonate with players revisiting the experience.

How long to beat Mass Effect 3

from 6 players
Main storyrushing through the story
18 h
Main + extrasstory plus side content
38 h
Completionisteverything the game has
56 h

More in the Mass Effect series

All 6 games in order

From the people behind Mass Effect 3

shared cast and crew

Games like Mass Effect 3

same kind of game, other series

Cast and crew

5 credits

Crew

Awards

0 won, 1 more nomination
British Academy Games Awards 2013

Media

Mass Effect 3 screenshot

Releases

Platform
Date
March 6, 2012 (North America first)
March 6, 2012

Earliest full release on each platform; regional dates can differ.

PC and Steam Deck

Steam store page

Steam Deck: Unsupported Valve reports it does not run

Minimum
Recommended
OS *
Win 7
Win 7
Processor
1.8 GHz Intel Core 2 Duo (equivalent AMD CPU)
2.4 GHz Intel Core 2 Duo (equivalent AMD CPU)
Memory
2 GB RAM
4 GB RAM
Graphics
Supported chipsets: NVIDIA 7900 or better; ATI X1800 or better. Please note that NVIDIA GeForce 9300, 8500, 8400, and 8300 are below minimum system requirements, as are AMD/ATI Radeon HD3200, HD3300, and HD4350. Updates to your video and sound card drivers may be required.
AMD/ATI Radeon HD 4850 512 MB or greater / NVidia GeForce 9800 GT 512 MB or greater
DirectX
Version 9.0c
Version 9.0c
Storage
15 GB available space
15 GB available space
Sound Card
DirectX 9.0c compatible
DirectX 9.0c compatible
Additional Notes
Supported chipsets: NVIDIA 7900 or better; ATI X1800 or better. Please note that NVIDIA GeForce 9300, 8500, 8400, and 8300 are below minimum system requirements, as are AMD/ATI Radeon HD3200, HD3300, and HD4350. Updates to your video and sound card drivers may be required.
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Requirements and Deck status as listed on Steam, checked Oct 28, 2026.

Mass Effect 3 player count

concurrent players on Steam
33playing now2h ago
44peak today
7530-day peak
75highest we have seenOct 24, 2026
Oct 23: 53 Oct 24: 75 Oct 25: 66 Oct 26: 51 Oct 27: 48 Oct 28: 53 Oct 29: 38 Oct 30: 46 Oct 31: 65 Nov 1: 64 Nov 2: 44
Oct 23daily peak, last 11 daystoday

Players counted on Steam every one to six hours; the daily peak is the highest count of the day.

Mass Effect 3 achievements

68 achievements on Steam

Rarest

The One and Only Defeat a group of Spectre-level opponents on Normal, Hardcore, or Insanity.
4.9%
Insanity Finish the game on Insanity without changing difficulty after leaving Earth.
5.3%
Technical Issues Investigate a strange occurrence in the combat simulator.
5.8%
Simulated Hero Score 9999 points in the combat simulator on Normal, Hardcore, or Insanity.
6.7%
Unwavering Finish all multiplayer maps on Gold or all single-player missions on Insanity.
7.2%
Meticulous Complete all the Command Center side-missions on Omega.
7.8%
All 68 achievements by how many players unlocked them
Veteran Kill 5,000 enemies.
10.6%
King of the Castle Win a prize at one of the arcade games.
11.1%
Overload Specialist Overload the shields of 100 enemies.
11.3%
Defender Attain the highest level of readiness in each theater of war.
14%
Battle Scarred Promote a multiplayer character to the Galaxy at War or import an ME3 character.
14%
Hijacker Hijack an Atlas mech.
14.1%
Gunsmith Upgrade any weapon to level 10.
14.2%
Conspiracy Theorist Use clues to pinpoint the exact location of an objective.
16.7%
Perfect Host Throw a party for your friends.
16.8%
Under Pressure Uncover an ancient secret.
17.8%
Team Player Infiltrate an enemy stronghold with your crew.
18%
Last Resort Stop an out-of-control scheme before it's too late.
18%
Family Matters Rescue a civilian from Reaper forces.
18.2%
High Society Go undercover to follow a lead.
18.2%
Priority Target Discover a plot against you.
18.4%
Savior Free Omega from Cerberus Occupation.
18.9%
No Stone Unturned Investigate a sinister conspiracy.
19%
Talon Find the Talon leader.
19.2%
Bruiser Kill 100 enemies with melee attacks.
19.5%
Long Service Medal Complete Mass Effect 3 twice, or once with a Mass Effect 2 import.
20.5%
Master and Commander Deliver most of the Galaxy at War assets to the final conflict.
22.3%
Freedom Fighter Find all required intel to help Eden Prime's colonists.
22.3%
Peak Condition Reach level 20 in multiplayer or level 60 in single-player.
24.2%
Always Prepared Obtain two non-customizable suits of armor.
24.4%
Sky High Lift 100 enemies off the ground with powers.
24.9%
Legend Mission accomplished.
25.1%
Mail Slot Kill 10 guardians with headshots from the front while their shields are raised.
25.2%
Patriot Make the final assault.
26.6%
Combined Arms Perform any combination of 50 biotic combos or tech bursts.
26.7%
Executioner Defeat an old adversary.
27.5%
Paramour Establish or rekindle a romantic relationship.
28.2%
Well Connected Send a warning across the galaxy.
28.6%
Lost and Found Dispatch 10 probes to retrieve people or resources in Reaper territory.
29%
Saboteur Disable a group of fighter squadrons.
29.2%
Last Witness Extract ancient technology.
29.2%
Hard Target Call down an orbital strike.
30.5%
Tour of Duty Finish all multiplayer maps or all N7 missions in single-player.
30.7%
Fact Finder Discover an enemy's monstrous origin.
30.8%
Problem Solver Evacuate a scientific facility.
30.9%
Party Crasher Sabotage a dreadnought.
31.7%
Arbiter Win a political stand-off.
33.9%
Tunnel Rat Survive the swarm.
34.4%
Pathfinder Explore a lost city.
34.6%
Liberator Stop a Cerberus kidnapping.
34.8%
Prothean Expert Learn more about the Prothean Empire.
35.1%
Untouchable Escape a Reaper in the galaxy map.
35.3%
Giant Killer Defeat a harvester.
35.8%
Pyromaniac Set 100 enemies on fire with powers.
36.7%
Soldier Kill 1,000 enemies.
37.2%
World Shaker Destroy an Atlas dropped from orbit.
37.3%
Explorer Complete three multiplayer matches or five N7 missions.
37.4%
Almost There Reach level 15 in multiplayer or level 50 in single-player.
37.8%
Mobilizer Bring a veteran officer aboard.
40.5%
Shopaholic Visit a store in the single-player campaign.
43.1%
Eye of the Hurricane Kill a brute while it's charging you.
44.5%
Bringer of War Chase down an assassin.
46.2%
Tourist Complete one multiplayer match or two N7 missions.
46.3%
Focused Evolve any of your powers to rank 6.
47.5%
Recruit Kill 250 enemies.
48.2%
Enlisted Start a character in multiplayer or customize a character in single-player.
50.9%
A Personal Touch Modify a weapon.
53.1%
Driven Return to active duty.
53.4%

Share of Steam players who unlocked each achievement.

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