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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: 82 - Words: 324,149 - Reviews: 823 - Favs: 821 - Follows: 1,091 - Updated: 11/24 - Published: 5/5/2019 - Legion, Pyrrha N., Penny P., God of Darkness
Mythos Effect by Omniscent1 reviews
A crossover between Mass Effect and Cthulhutech. Humanity has won the Aeon War and has since expanded and thrived. How will the galaxy fare with this new power?
Crossover - Cthulhu Mythos & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 27 - Words: 221,878 - Reviews: 1883 - Favs: 5,027 - Follows: 5,812 - Updated: 11/23 - Published: 6/5/2013 - Saren A., Shepard, OC
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: 7 - Words: 48,184 - Reviews: 94 - Favs: 438 - Follows: 651 - Updated: 11/20 - Published: 1/17 - Adeptus Mechanicus, Tali'Zorah, Shepard
Mass Effect demi humans by EclipsePheniox reviews
Long ago on earth demi-humans appeared on earth. Now expanding into the galaxy the other races have to deal with both humans and demi-humans. Mass effect story from beginning to end but with monster people to make it more interesting. Experimental, possible harem
Crossover - Mass Effect & Monster Girl Encyclopedia - Rated: M - English - Adventure/Sci-Fi - Chapters: 43 - Words: 144,359 - Reviews: 57 - Favs: 274 - Follows: 296 - Updated: 11/20 - Published: 8/2/2019
New Era II by martinantab reviews
The war has ended and UNSC/UEG can finally start with rebuilding. Former Covenant races created new alliance to prevent another big war. Everybody thought that they can live peacefully, but few years later UNSC Gargantua has discovered mysterious object in the Orion's arm and no one is sure, if everything will be the same again.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 4 - Words: 25,950 - Reviews: 25 - Favs: 126 - Follows: 181 - Updated: 11/19 - Published: 10/28 - Master Chief/John-117, T. Lasky, Councilor Tevos, Councilor Valern
New Start Plus: in spaaaaace! by omaster43 reviews
Nick Walters and his merry band of misfits are back with a story about helping Shepard and crew fight giant eldritch robot abominations, most likely through Dumb magic and crazy shenanigans This is a continuation of my previous story, so reading that one first is recommended. but I'm not your nanny you wanna be confused that's your choice. Oc-insert, just came from Dragon age
Crossover - Game X-overs & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 8 - Words: 198,822 - Reviews: 104 - Favs: 268 - Follows: 323 - Updated: 11/18 - Published: 6/6 - Garrus V., Tali'Zorah, Shepard
Mass Effect: Book of Korra by CommanderSheperddddd reviews
The world the knew is gone. Their mere existence contradicts all logic. But for Korra and the Krew rest isn't a luxury they cna afford, as even when placed in an unknown world, there is still need for heroes.
Crossover - Mass Effect & Legend of Korra - Rated: M - English - Sci-Fi/Horror - Chapters: 1 - Words: 1,345 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 11/18 - Shepard, Korra, Mako, Bolin
Mobile Suit - Mass Effect: The First Contact War by Mister Smallville reviews
Two worlds collide, neither prepared for the other. The Solar Sphere Congress -successor to the long gone Earth Federation- unwittingly starts a galactic crisis when it makes first contact with a very angry, very trigger happy Turian Hierarchy.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 10 - Words: 59,235 - Reviews: 123 - Favs: 237 - Follows: 361 - Updated: 11/18 - Published: 8/7
Commissar Shepard by Sabethetan reviews
You always heard of stories when Shepard is paragon and alien-friendly. But what if he got ACTUAL REASONS to hate aliens and was forced to work with them? Can he put away his hatred to stop Reapers?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,449 - Reviews: 14 - Favs: 24 - Follows: 29 - Published: 11/17
A Whole New World by Spartan III Commando reviews
Noble six's story did not end on Reach, he escaped the doomed planet after saving the Pillar of Autumn, and he and 117 fought across each Halo, until an incident sent him to a whole new world. And he is wholly unprepared for the journey in store.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 12 - Words: 50,151 - Reviews: 72 - Favs: 379 - Follows: 538 - Updated: 11/16 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
Saiyan Effect by bored peasant reviews
The Citadel Council weren't ready for a species with the power of the saiyans at their back.
Crossover - Mass Effect & Dragon Ball Super - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 89,924 - Reviews: 744 - Favs: 1,986 - Follows: 2,370 - Updated: 11/15 - Published: 8/9/2017 - Son Gohan, Son Goku, Vegeta
Mass Effect: Reaper T8 by ArcherEdgeBond reviews
A Reaper threat and three different Sheppards. how will the universe handle this. follow Geoff, John, and Jane Shepard as they fight the reapers for survival and fight a new threat soon to take hold.(this was a challenge given to me by my friend the unforgivenone19901. if you have not checked out his work please do) (Disclaimer: I do not own the rights, this is purely fanmade)
Crossover - Terminator & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 12 - Words: 31,737 - Reviews: 1 - Favs: 13 - Follows: 11 - Updated: 11/14 - Published: 2/25/2020
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 13 - Words: 44,361 - Reviews: 116 - Favs: 442 - Follows: 661 - Updated: 11/14 - Published: 7/8/2022 - Rookie, Shepard
Command effect: Rise of the three powers by aris1606 reviews
Anyone wondering what would happen after the events of the Uprising? There are a lot of possibilities. Time machines, Yuriko Omega on the loose, desolators, giga fortresses and a lot of other stuff. It's gonna be a crazy ride.
Crossover - Mass Effect & Command & Conquer - Rated: M - English - Adventure/Sci-Fi - Chapters: 33 - Words: 115,251 - Reviews: 79 - Favs: 162 - Follows: 239 - Updated: 11/13 - Published: 10/16/2019 - Shepard
Mass Wars Episode II by Fantasymaker76 reviews
Five Years have past since the destruction of the Normandy and the death of Commander Shepard. Now a new order is rising in the unmapped regions of the galaxy which is leaving unease in both the Republic and the Citadel. Determined to find out what is going on, a pro-human organisation has made plans to find out what this mysterious group wants.
Crossover - Mass Effect & Star Wars - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 30,438 - Reviews: 12 - Favs: 31 - Follows: 35 - Updated: 11/13 - Published: 3/13
Star-Bound by The Incredible Muffin reviews
Some destinies are written out centuries, or even millennia, ahead of time. However, when destiny is derailed, new plans have to be implemented. Sometimes, that involves ripping someone away from the peaceful end they seek and thrusting them into a tide of never-ending war in order to fix what can never be repaired.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 39 - Words: 266,923 - Reviews: 1137 - Favs: 1,452 - Follows: 1,787 - Updated: 11/11 - Published: 5/29/2019
The Man, The Myth, The Legend by Grocamol reviews
A simple one shot fic I had made some time ago, time to share it. Enjoy!
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 1 - Words: 6,995 - Reviews: 6 - Favs: 24 - Follows: 17 - Published: 11/11 - A. J. Johnson - Complete
All the Stars by BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 46 - Words: 802,179 - Reviews: 1331 - Favs: 1,875 - Follows: 2,235 - Updated: 11/9 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard
NarutoMass Effect Challenge by bradwall0715 reviews
A challenge for anyone interested, Have fun and good luck.
Crossover - Naruto & Mass Effect - Rated: T - English - Chapters: 1 - Words: 1,076 - Reviews: 3 - Favs: 3 - Follows: 3 - Published: 11/9 - Naruto U., Shepard
To Sail Among the Stars by How-not-to-do-something reviews
The Universal Century promised a new Era, and brought conflict. But the stars shine on, awaiting those who seek a new start. Crossposted from Ao3.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 12 - Words: 60,334 - Reviews: 29 - Favs: 96 - Follows: 120 - Updated: 11/6 - Published: 11/1/2022
Kage of the Stars V2 by Warlock99 reviews
Saving people is hard as is being a hero, but saving this universe? Well, that's going to take an army that transcends and breaks the laws of the universe. And a Kage to lead them to victory. Large Multi Crossover
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure - Chapters: 6 - Words: 14,248 - Reviews: 13 - Favs: 63 - Follows: 81 - Updated: 11/5 - Published: 9/30 - Naruto U., Sara Ryder
Descent of the Angels by IReadToLive99 reviews
From a war-torn galaxy to another at the edge of extinction. The Blood Angels, through mysterious providence, are here now. Absent of the guidance of the Primarch and the Emperor, duty and devotion will lead them on a path to safeguard humanity from the darkness that lurks amongst the stars.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 11,849 - Reviews: 35 - Favs: 189 - Follows: 288 - Updated: 11/5 - Published: 5/25 - Space Marines, Shepard
Stellar Effect by Brandon Storm reviews
The Reapers trap was perfect in its design. Their execution refined over billions of years, their technology refined since the dawn of time itself. Right up until Someone Broke the Trap!
Crossover - Mass Effect & Stellaris - Rated: T - English - Adventure/Sci-Fi - Chapters: 66 - Words: 289,833 - Reviews: 259 - Favs: 388 - Follows: 506 - Updated: 11/5 - Published: 8/7/2022
Effect of a Titanfall by MidnightFenrir reviews
When you die, you expect things to happen, from the void to eternal happiness. But if given the choice to live again, wouldn't you take it? I did. Since then, it's been one crazy thing after the other, the latest of which was to end up in yet another universe. But what can you expect when the manifestations of Luck and Fate themselves tell you it's going to be an adventure? OC/SI.
Crossover - Mass Effect & Titanfall - Rated: M - English - Adventure/Sci-Fi - Chapters: 8 - Words: 62,206 - Reviews: 343 - Favs: 1,881 - Follows: 2,441 - Updated: 11/4 - Published: 12/17/2016 - Kasumi G., Shepard, OC, BT-7274
Petroleum Effect by PetroleumHead reviews
A dark alternative Mass Effect universe with a little bit of XCOM and a little bit of Cthulhu Mythos, along with some short-lived Care Bears. If humanity discovers that, in the right circumstances, petroleum can be used as a superior alternative to element zero, just how far will Earth's increasingly post-human, xenophobic, authoritarian government go to obtain oil?
Crossover - Care Bears & Mass Effect - Rated: M - English - Sci-Fi/Horror - Chapters: 13 - Words: 42,515 - Reviews: 23 - Favs: 36 - Follows: 39 - Updated: 11/1 - Published: 9/16
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