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A New Opposing Force by Arentanji reviews
Adrian Shepard has escaped the G-man's prison that was an osprey in the void by going through the portal that the G-man used to leave the osprey. Elite combine 3650 was taken here with Wilson also. They find themselves on Eden Prime, hours before the attack close to the spaceport. Rated T, for now. This is a Passion Project, meaning an uploading schedule is almost nonexistent.
Crossover - Half-Life & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 1,759 - Reviews: 4 - Favs: 11 - Follows: 19 - Updated: 3/6 - Published: 10/23/2022 - A. Shephard, The Combine, Tali'Zorah, Shepard
War of the Old Ones by Ian the Mechanic reviews
In forgotten ages past, two near eldritch forces vied for the very life essence of the Galaxy. Unknown to the young races, that war is still ongoing. how can the UNSC, the Citadel Council or the Covenant hope to stand against such forces, when they are still embroiled in their own petty squabbling? How could they hope to survive the War of the Old Ones?
Crossover - Mass Effect & Halo - Rated: M - English - Sci-Fi/Horror - Chapters: 17 - Words: 89,915 - Reviews: 101 - Favs: 214 - Follows: 315 - Updated: 3/6 - Published: 2/21/2022
Technophiles and Militarists by thelordofdarkreunion reviews
The Reaper invasion is nigh. Outnumbered and outgunned, the Citadel must turn to two new, dangerous allies for salvation: the Adeptus Mechanicus and Imperium of Man.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 28 - Words: 334,199 - Reviews: 637 - Favs: 477 - Follows: 583 - Updated: 3/5 - Published: 4/22/2022 - Imperial Guard, Space Marines, Adeptus Mechanicus, Shepard - Complete
Stellar Effect Codex by Brandon Storm reviews
A Codex exploring the History and Lore of the Stellar Effect Universe
Crossover - Mass Effect & Stellaris - Rated: T - English - Sci-Fi - Chapters: 11 - Words: 25,561 - Reviews: 19 - Favs: 32 - Follows: 28 - Updated: 3/5 - Published: 8/7/2022
Rising from the Embers of Sera by thehappy reviews
The people of Sera rebuild, spreading to the stars. Wars will be waged. Peace will be sought. The Coalition has risen from the ashes to take their right to exist in the galaxy. They will survive...no matter the cost.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 289,385 - Reviews: 292 - Favs: 558 - Follows: 691 - Updated: 3/4 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
The Ruby of Cerberus by Scrambleman17 reviews
1 week before classes start again, team RWBY watched a report relaying to a strange light at Vale's industrial district, what they didn't know is that it would lead them to another dimension quite different from their own, and unwillingly trap themselves in this strange dimension. contains liberties with canon from both franchises and inevitable OCs.
Crossover - Mass Effect & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 84,386 - Reviews: 39 - Favs: 76 - Follows: 98 - Updated: 3/3 - Published: 9/7/2021 - Miranda L., OC, Team RWBY
Adventures of Captain Jason and Agronauts by johny woodpecker
While Shepard does his thing, captain Jason and his friends travel the galaxy from alternate perspective. Crossover with lots of stuff, but mostly TF2
Crossover - X-overs & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 7 - Words: 6,783 - Updated: 3/3 - Published: 10/14/2022
Destiny Lost by Twisted Fate MK 2 reviews
The Gods left remnant together, with the statement they would never return to it or influence it. Only, that wasn't true, was it? The God of light, ever the hypocrite and liar, didn't abandon Remnant. Instead, he reincarnated someone to do his bidding and bring Remnant to them. Cue, the now dead Pyrrha Nikos and the God of Darkness' ideas. / Supporter Requested by Espacole & Spork
Crossover - Mass Effect & RWBY - Rated: M - English - Adventure - Chapters: 65 - Words: 269,119 - Reviews: 710 - Favs: 723 - Follows: 1,003 - Updated: 3/3 - Published: 5/5/2019 - Legion, Pyrrha N., Penny P., God of Darkness
A Tale of Two Engineers: Redux by Inkytan reviews
A romantic action story involving Isaac Clarke (romanced with Tali'Zorah) After Isaac becomes somehow thrown into the universe of Mass Effect, he joins up Shepard's crew, experiencing crazy adventures and emotional moments with his new family and newfound love. Just, give it a read, you might like it. - This is an old high school fanfiction I'm rewriting. It's been 8 years lol
Crossover - Mass Effect & Dead Space - Rated: M - English - Romance/Sci-Fi - Chapters: 3 - Words: 27,735 - Reviews: 42 - Favs: 169 - Follows: 216 - Updated: 3/3 - Published: 8/22/2015
Spider-Effect by pyrohelixdrago reviews
Strange needed to do more than make people forget about Peter Parker...he needed there to be no Peter Parker at all, with no other options and with some help from outside forces Strange sends Peter somewhere, he can reach his true potential as a hero and an Avenger.
Crossover - Spider-Man & Mass Effect - Rated: M - English - Chapters: 3 - Words: 53,639 - Reviews: 61 - Favs: 246 - Follows: 273 - Updated: 3/2 - Published: 7/30/2022 - Peter P./Spider-Man
Sufficiently Advanced Percussive Maintenance by WiseTomato reviews
Thor landed head first in the Presidium, and then the Geth attacked. It was an improvement on his day so far.
Crossover - Mass Effect & Thor - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 12,362 - Reviews: 58 - Favs: 384 - Follows: 428 - Updated: 3/1 - Published: 3/22/2022
Mortal Desperations by Solthrin reviews
Arcturus Magnus, Sagittarum of the Legio Custodes, has fought for years within the webway and the Impossible City. Upon taking a near-fatal wound, the Emperor Himself removes Arcturus from the front, sending him instead to bring forth reinforcements from the Mechanicum. When something goes wrong during the return, where does this Custodian find himself?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,989 - Reviews: 45 - Favs: 171 - Follows: 272 - Updated: 2/28 - Published: 1/17 - Adeptus Mechanicus, Tali'Zorah, Shepard
The Terran Effect 2: Beneath the Sea by TimeTraveller-1900 reviews
An unexpected discovery with no leads stuns the Seaview crew.
Crossover - Voyage to the Bottom of the Sea & Mass Effect - Rated: K - English - Sci-Fi - Chapters: 1 - Words: 1,504 - Reviews: 2 - Favs: 13 - Follows: 14 - Published: 2/28
Mass Effect-Batman: Crisis On The Citadel by James Keller reviews
After 2 years of operating on Omega, The Dark Knight comes to the Citadel in pursuit of a dangerous new drug that is about to be unleashed upon the very heart of Council Space. This will put him into an alliance with Lt. Garrus Vakarian of C-Sec's Major Crimes Unit as they uncover a massive Conspiracy.
Crossover - Mass Effect & Batman - Rated: M - English - Crime/Mystery - Chapters: 5 - Words: 33,400 - Reviews: 10 - Favs: 32 - Follows: 34 - Updated: 2/27 - Published: 10/29/2021 - Bruce W./Batman, Garrus V., Liara T'Soni, Tali'Zorah
Rise of the Federation Alliance: Federation-Citadel War by SimplyLaggy reviews
( AU) A Citadel Council patrol fleet stumbles upon a Starfleet exploratory fleet who just discovered a mass relay, and fires on it, sparking a war on levels beyond the Citadel's imaginations! Meanwhile, Reapers detect these newcomers, and with their superiority complex, attack early! Meanwhile, Q sits on a beach chair munching popcorn, watching, and laughing!
Crossover - StarTrek: The Next Generation & Mass Effect - Rated: T - English - Chapters: 2 - Words: 5,646 - Reviews: 20 - Favs: 84 - Follows: 127 - Updated: 2/27 - Published: 2/21 - J. Picard, Admiral Hackett, Shepard
The Reclamation by Fade Maybe reviews
Through ONI's manipulation, the UNSC stumbles upon a Mass Relay and is dragged into a new war. They'll discover the battered races of the Citadel, the political intrigue of its factions, and a second group of humans governed by the Systems Alliance, divided by Cerberus, and lead by Commander Shepard. Yet no one can stop what is to come: the Reclamation, and the death of the galaxy.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Suspense - Chapters: 55 - Words: 409,476 - Reviews: 1672 - Favs: 1,783 - Follows: 2,209 - Updated: 2/27 - Published: 3/13/2013
Alliance: Zeroes (The AI Generated Disasterpiece) by JSToast reviews
The Zeroes program was created after the fracture in reality that Commander Shepard had caused. This fracture gave many ordinary citizens powers not of that world, to be known from then on as "Awoken." Many feared them, but Shepard sought to end their misery. For this, she created the Zeroes program, where those who wanted to, could prove themselves. Irin was one of them.
Crossover - Fallout & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 1 - Words: 2,400 - Reviews: 2 - Favs: 1 - Published: 2/26
Salvation (ENG) by Z0n3theDaMn3d reviews
The knowledge of sin is the beginning of salvation. More than 40 years after the end of the war against the Covenant, a new storm is brewing on the edge of the human empire. Will the colonies of the Linwood Sector be able to withstand this new threat or will they burn like Harvest once did?
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 80,355 - Reviews: 123 - Favs: 326 - Follows: 499 - Updated: 2/26 - Published: 10/8/2020 - T. Hood, Shepard, Councilor Tevos, Benezia
NieR: Ghosts of a bygone Era by The meme lord of the east reviews
After the fall of the Tower, androids are finally united and ready to explore space in search of friendly species, what they found was a galactic community of aliens with deeply rooted hatred for AI. Will the galactic community make an exception for the Androids? or will they indulge in petty wars while another threat looms on the horizon? Citadel vs Reapers vs Humans.
Crossover - Mass Effect & Nier - Rated: T - English - Sci-Fi/Supernatural - Chapters: 4 - Words: 21,629 - Reviews: 25 - Favs: 104 - Follows: 159 - Updated: 2/26 - Published: 10/16/2022 - 2B, 9S, YoRHa Commander
A Galaxy of Inheritors and Usurpers by HaloZealotDemon reviews
The Separatists destroy the Covenant in a brutal war, yet in the 2570s they persist in their efforts, but in two years they will be gone. However The Gods have other plans. The Migrant fleet decides that to escape through Relay 314 to unknown space, but meet, as LTCOL Church said "Sleep-deprived Titans with negative zero fucks to give." Heavy AU, Rvb elements, swearing.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 2 - Words: 17,002 - Reviews: 39 - Favs: 192 - Follows: 263 - Updated: 2/25 - Published: 12/25/2022 - Arbiter, T. Hood, Tali'Zorah, Councilor Sparatus
A Knight of the Stars by TheBlindOrchid reviews
After barely escaping Order 66 with her life, Jedi Knight Kyra Katobi finds herself thrust into another grand calling, and another war. Perhaps this time, she can prevent the ones she cares about from dying. Takes place during Mass Effect 2/Post ROTS. Shepard x OC Mirialan Jedi. Reboot of my story A Knight's Redemption.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Romance - Chapters: 2 - Words: 5,128 - Reviews: 5 - Favs: 19 - Follows: 38 - Updated: 2/22 - Published: 2/20 - OC, Shepard
On the Illusion of Might by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 27 - Words: 297,181 - Reviews: 2072 - Favs: 3,781 - Follows: 4,771 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
SAGE EFFECT by The Guarding Dark reviews
Dying at the tender age of nineteen sucked. Being reborn In a doomed future. With a Pair of Rinnegan eyes, and an apocalypse bearing down on me. Sucked even more. And being born on Mindoir certainly didn't help matters. (Rated M for extreme blood and gore as of chapter ten, read at your own risk. Possible OCXFemshep.)
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Drama - Chapters: 19 - Words: 71,783 - Reviews: 443 - Favs: 1,115 - Follows: 1,444 - Updated: 2/21 - Published: 9/8/2014
The Return of Hope by Masso 2010 reviews
Commander Shepard is dead. Knowing that they needed someone to complete his work fighting against the Reapers, The Illusive Man set his sights on the next best thing, Humanities greatest hero. The only problem is that Superman gave up on hero work a long time ago but can the threat of galactic extinction be enough for him to once again step into the light.
Crossover - Superman & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 22 - Words: 190,792 - Reviews: 276 - Favs: 608 - Follows: 719 - Updated: 2/20 - Published: 7/10/2020 - Clark K./Kal-El/Superman, Miranda L.
Space Effect by Foyden reviews
In an attempt to escape from the blood moons, Isaac and Carver launch a ship on a superluminal journey. At this time, Normandy explores one of the systems and discovers an unknown spacecraft.
Crossover - Mass Effect & Dead Space - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 15,854 - Reviews: 9 - Favs: 60 - Follows: 86 - Updated: 2/19 - Published: 2/16 - Shepard, Isaac C., J. Carver
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