Master and Commander Trophy in Mass Effect 3
Master and Commander
Deliver most of the Galaxy at War assets to the final conflict.
How to unlock Master and Commander
(Missable)
This is best done in conjunction with Defender. You can get the trophy without doing any of the co-op missions, but you will have to complete every side mission, carry over specific choices from ME2 (saving the Collector Base, for instance), and make specific storyline choices (deceiving the krogan and making peace between the quarians and geth). What you want is that by the time you launch the assault on Cerberus headquarters, your effective military readiness (the green bar) is at or above 4000. To make it easier, use the method in Defender and you'll get 3-4% after each mission that you play. Completing about two thirds of the side missions and playing three co-op missions got me over 4000.
The way that your effective military readiness is calculated is by taking your overall readiness and multiplying it by your galactic readiness rating (Galaxy at War percentage) (OMR * GRR% = EMR). Basically, whatever your galactic readiness rating is, then your effective military readiness will be that percentage of the your overall readiness. If you reach Cerberus HQ with an overall readiness of 6000, but your Galaxy at War percentage is still at 50%, then your effective military readiness will be 50% of that, or 3000.
If you reach the Cerberus HQ mission and you are not at 4000, I would recommend making an extra save (just in case), completing Defender, and then continuing on with the story. Reaching maximum readiness will dramatically increase your overall asset total.
One thing to be aware of is that progressing through the story missions will lock out the side missions. The way that you should handle the missions is to do all of the side missions first before completing the story missions (marked Priority).
If you go into the final battle and do not get this, don't worry. Complete the game anyway. Once you beat it, you will be returned to the point of no return. Go online and start working on Defender. Once you're at 100%, go back and reload your saved game. Start up Priority: Cerberus Headquarters and the trophy will unlock soon after.
The missions that you will have to complete (in addition to the main story missions) are:- Apien Crest: Banner of the First Regiment
- Aria: Eclipse
- Aria: Blood Pack
- Aria: Blue Suns
- Arrae: Ex-Cerberus Scientists
- Athena Nebula: Hesperia-Period Statue
- Attican Traverse: Krogan Team
- Benning: Evidence
- Citadel: Alien Medi-Gel Formula
- Citadel: Asari Widow
- Citadel: Barla Von
- Citadel: Batarian Codes
- Citadel: Biotic Amp Interfaces
- Citadel: Cerberus Automated Turret Schematics
- Citadel: Cerberus Ciphers
- Citadel: Cerberus Retribution
- Citadel: Cerberus Turian Poison
- Citadel: Chemical Treatment
- Citadel: GX12 Thermal Pipe
- Citadel: Hanar Diplomat
- Citadel: Heating Unit Stabilizers
- Citadel: Improved Power Grid
- Citadel: Inspirational Stories
- Citadel: Kaliosaur Fossil
- Citadel: Krogan Dying Message
- Citadel: Medi-Gel Sabotage
- Citadel: Medical Supplies
- Citadel: Reaper Code Fragments
- Citadel: Target Jamming Technology
- Citadel: Volus Ambassador
- Citadel: Wounded Batarian
- Dekuuna: Code of the Ancients
- Dekuuna: Elcor Extraction
- Grissom Academy: Emergency Evacuation
- Hades Nexus: Obelisk of Karza
- Hades Nexus: Prothean Sphere
- Irune: Book of Plenix
- Ismar Frontier: Prototype Components
- Kallini: Ardat-Yakshi Monastery
- Kite’s Nest: Pillars of Strength
- N7: Cerberus Abductions
- N7: Cerberus Attack
- N7: Cerberus Fighter Base
- N7: Cerberus Lab
- N7: Communication Hub
- N7: Fuel Reactor
- Nimbus Cluster: Library of Asha
- Rannoch: Admiral Koris
- Rannoch: Geth Figher Squadrons
- Shrike Abyssal: Prothean Obelisk
- Silean Nebula: Rings of Alune
- Tuchanka: Bomb
- Tuchanka: Turian Platoon
- Valhallan Threshold: Prothean Data Drives
First unlocked by
- Jun 25, 2010 06:48 AM
- Jan 17, 2011 04:15 AM
- Jul 05, 2011 09:26 PM
- Jul 18, 2011 09:56 PM
- Jul 18, 2011 09:56 PM
Recently unlocked by
- Sep 30, 2024 12:58 AM
- Mar 10, 2024 01:52 AM
- Feb 27, 2024 01:39 PM
- Feb 27, 2024 07:27 AM
- Feb 20, 2024 10:39 PM
Friday, March 09, 2012 @ 12:49 AM
Friday, March 09, 2012 @ 02:11 AM
Tuesday, March 13, 2012 @ 12:30 AM
Wednesday, March 14, 2012 @ 12:54 PM
Monday, March 19, 2012 @ 06:40 AM
Thursday, March 22, 2012 @ 06:59 PM
Friday, April 06, 2012 @ 08:47 PM
Saturday, April 07, 2012 @ 08:14 PM
Sunday, April 08, 2012 @ 02:15 AM
Monday, April 09, 2012 @ 03:42 PM
Thursday, April 12, 2012 @ 08:48 PM
Thursday, June 14, 2012 @ 01:21 PM
Sunday, September 30, 2012 @ 11:19 PM
Sunday, February 17, 2013 @ 07:59 AM
Sunday, March 17, 2013 @ 07:08 PM
Thursday, March 21, 2013 @ 10:30 AM
Monday, April 22, 2013 @ 11:02 AM
Friday, May 10, 2013 @ 05:41 PM
Tuesday, May 21, 2013 @ 02:44 AM
Sunday, May 26, 2013 @ 06:07 PM
Sunday, September 01, 2013 @ 05:40 AM
Monday, November 04, 2013 @ 09:32 PM
Tuesday, January 14, 2014 @ 07:19 AM
Monday, February 17, 2014 @ 10:43 AM
Wednesday, April 16, 2014 @ 10:50 AM
Saturday, September 20, 2014 @ 10:12 PM
Monday, October 27, 2014 @ 01:09 AM
Wednesday, May 27, 2015 @ 01:08 PM
Tuesday, May 10, 2016 @ 06:36 PM
Saturday, October 07, 2017 @ 03:34 PM
Friday, November 09, 2018 @ 11:55 PM