During the Credits
There are no extras during the credits of Mass Effect 3.
After the Credits
There are three ending paths to Mass Effect 3, yet the extra scene after the credits is the same no matter which ending a player chooses.
After the credits there is a stargazer, most likely the grandfather, and child talking. The stargazer had just told the child a story about the Commander Shepard legend. He states that it happened long ago, and that many of the details have been “lost in time.” The child asks to be told more, and the Stargazer replies that it is getting late, but there is time for one more story.
After the extra scene there is a message about further playable missions and DLC that reads “Commander Shepard has become a legend by ending the Reaper threat. Now you can continue to build that legend through further gameplay and downloadable content.
Special thanks to Rex for the stinger submission
There are multiple different endings depending on how much EMS (Effective Military Strength) is achieved before embarking on the final mission.
Collector’s Base Destroyed
0 – 1,749 EMS: Your only choice is to destroy the Reapers. Earth is destroyed.
1,750 – 1,899 EMS: Shepard can choose to destroy the Reapers, or control them. If you destroy the Reapers, Earth is destroyed in the process as well. If you control the Reapers, Earth is devastated but not destroyed.
1,900 – 2,349 EMS: Shepard can choose between destroying and controlling Reapers. Both choices save earth, and humanity survives, however Earth’s buildings still get vaporized.
2,350 – 2,649 EMS: Shepard can control Reapers, and save Earth
2,650 – 2,799 EMS: Shepard can destroy Reapers, and save Earth. Shepard Dies.
2,800 – 3,999 EMS: Shepard is able to create a link between Synthetics and Organics, and Earth and the Galaxy are saved
4,000 – 4,999 EMS: You can destroy the Reapers and Earth is saved. If you shot TIM on time and saved Anderson, Shepard breathes (Survives).
5,000+ EMS: You can destroy all Reapers. Earth saved as well. Shepard will breath, whether you attempted to save Anderson or not. (Perfect Ending)
Collector’s Base Remained Intact
0 – 1,749 EMS: Shepard’s only choice is to destroy the Reapers. Earth is destroyed.
1,750 – 2,049 EMS: Shepard can control the Reapers or destroy them. Destroying the Reapers also destroys Earth. Controlling the Reapers damages earth but does not destroy it.
2050 – 2,349 EMS: Shepard has choice between controlling and destroying Reapers. You save Earth from destruction either way, and humans live, but Earth is still devastated and buildings vaporized.
2,350 – 2,649 EMS: Shepard can destroy the Reapers. Earth is badly damaged but isn’t destroyed completely
2,650 – 2,799 EMS: Shepard can destroy the Reapers and save Earth.
2,800 – 3,999 EMS: Shepard can create the Synergy between Organics and Reapers to save Earth and the Galaxy
4,000 – 4,999 EMS: Shepard can destroy Reapers. Earth survives. If you shot The Illusive Man on time and saved Anderson, Shepard Survived.
5,000+ EMS: Shepard can destroy Reapers. Earth survives. Shepard also survives regardless if you tried to save Anderson or not. (Perfect Ending)