This is the timeline for the Mass Effect universe, based on the video game series by Bioware and its accompanying spin-off material in novels, comics, and mobile games.

The main games are in bold underlined black text, the downloadable content for the games is in underlined regular black text, the spin-off games for mobile devices are in bold gray underlined text, the novels are in bold italicized blue text, the Cerberus and Alliance news articles are in italicized blue text, the comics are in bold italicized green text, with short comic stories in italicized green text, and the 4D theme park ride Mass Effect - New Earth listed in bold purple text.

The years the events take place in are in bold underlined regular text, with the entries following. Certain flashback scenes aren't given a specific year, so are listed as "???? CE".

I've included tertiary stuff like Mass Effect 3 - Datapad and Mass Effect 3 - Multiplayer (and its various expansions). While there is little, if any, story expansion provided by those entries, they do help flesh out what was going on in the rest of the galaxy during the events of Mass Effect 3 outside of Shepard's team. I also included the Blasto - Eternity is forever short comic story. It doesn't act as something actually happening in the overall story itself, but as a fictional film character and story within the Mass Effect universe. Again, its merely a tertiary expansion of the universe in that regard.







???? CE
Mass Effect - Homeworlds #3 (pg. 1-2)

2157 CE
Mass Effect - Revelation (Prologue)
Mass Effect - Evolution #1
Mass Effect - Evolution #2
Mass Effect - Evolution #3
Mass Effect - Evolution #4

2160 CE
Mass Effect - Foundation #13 (pg. 1-2, 8, 14)

2161 CE
Mass Effect - Foundation #1 (pg. 1-21)

2165 CE
Mass Effect - Revelation (Ch. 1-22, Epilogue)

2168 CE
Mass Effect - Foundation #4 (pg. 1-20)

???? CE
Mass Effect - Foundation #12 (pg. 2-22)

2175 CE
Mass Effect - Foundation #10 (pg. 3-20, 1-2, 21-22)

2176 CE
Mass Effect - Homeworlds #1 (pg. 3-21)

???? CE
Mass Effect - Homeworlds #3 (pg. 5)
Mass Effect - Foundation #11 (pg. 3)

2183 CE
Mass Effect - Foundation #9 (pg. 3-22)
Mass Effect - He Who Laughs Best
Mass Effect - Homeworlds #3 (pg. 6-7)
Mass Effect - Foundation #1 (pg. 22)
Mass Effect - Foundation #2
Mass Effect - Homeworlds #2 (pg. 3-18, 1-2, 19-20)
Mass Effect
Mass Effect - Foundation #3
Mass Effect - Bring Down the Sky
Mass Effect - Pinnacle Station
Mass Effect - Homeworlds #2 (pg. 21)
Mass Effect - Foundation #4 (pg. 21-22)
Mass Effect - Homeworlds #3 (pg. 8-9)
Mass Effect - Galaxy
Mass Effect - Incursion
Mass Effect 2 (Prologue)
Mass Effect - Foundation #5
Mass Effect - Foundation #6
Mass Effect - Redemption #1
Mass Effect - Redemption #2
Mass Effect - Redemption #3
Mass Effect - Redemption #4
Mass Effect - Foundation #7
Mass Effect - Foundation #8
Mass Effect - Foundation #9 (pg. 1-2)
Mass Effect - Foundation #11 (pg. 1, 4-7, 2, 8-22)
Mass Effect - Foundation #12 (pg. 1)
Mass Effect - Foundation #13 (pg. 2-7, 9-13, 15-22)
Mass Effect - Ascension
Mass Effect - Paragon Lost (0:00:00 - 0:21:28)

2184 CE
Mass Effect - Homeworlds #3 (pg. 10-16)

2185 CE
Mass Effect - Paragon Lost (0:21:29 - 1:30:40)
Mass Effect - Genesis
Mass Effect 2
Mass Effect - Homeworlds #3 (pg. 3-4, 17-22)
Mass Effect 2 - Zaeed: The Price of Revenge
Mass Effect 2 - Kasumi: Stolen Memory
Mass Effect 2 - Normandy Crash Site
Mass Effect 2 - Firewalker
Mass Effect 2 - Overlord
Mass Effect 2 - Lair of the Shadow Broker
Mass Effect - Cerberus Daily News
Mass Effect - Discovery #1
Mass Effect - Discovery #2
Mass Effect - Discovery #3
Mass Effect - Discovery #4

2186 CE
Mass Effect - Retribution
Mass Effect - Inquisition
Mass Effect - Deception
Mass Effect 2 - Arrival
Mass Effect - Conviction
Mass Effect - Invasion #1
Mass Effect - Invasion #2
Mass Effect - Invasion #3
Mass Effect - Invasion #4
Mass Effect - Infiltrator
Mass Effect - Infiltrator: Incarceration
Mass Effect - Homeworlds #4
Mass Effect - Blasto: Eternity is Forever
Mass Effect - Alliance News Network
Mass Effect - New Earth (California's Great America - Santa Clara, CA)
Mass Effect - Genesis 2
Mass Effect 3
Mass Effect - Homeworlds #1 (pg. 1-2, 22)
Mass Effect 3 - From Ashes
Mass Effect 3 - Leviathan
Mass Effect 3 - Omega
Mass Effect 3 - Citadel
Mass Effect 3 - Datapad
Mass Effect 3 - Multiplayer
Mass Effect 3 - Multiplayer: Resurgance
Mass Effect 3 - Multiplayer: Rebellion
Mass Effect 3 - Multiplayer: Earth
Mass Effect 3 - Multiplayer: Retaliation
Mass Effect 3 - Multiplayer: Reckoning
Mass Effect - Homeworlds #2 (pg. 22)
Mass Effect 3 - Extended Cut

2818 CE
Mass Effect - Andromeda: Nexus Uprising

2819 CE
Mass Effect - Andromeda
Mass Effect - Andromeda: Annihilation** (June 26, 2018)
Mass Effect - Andromeda: Initiation** (November 28, 2018)