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To Infinity by
creamofwheat2311 reviews
After discovering an ancient artifact, the UNSC's most advanced warship and a Sangheili Assault Carrier are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 46 - Words: 390,407 - Reviews: 3556 - Favs: 4,088 - Follows: 4,905 - Updated: 7/25 - Published: 10/9/2013 - Master Chief/John-117, Arbiter, T. Lasky, Shepard (M)
Enduring the Flames of War by
Masterdude21 reviews
A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Horror - Chapters: 32 - Words: 452,176 - Reviews: 1657 - Favs: 2,441 - Follows: 3,108 - Updated: 7/12 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard (F)
The Spartan Effect by
Gatekeeper333 reviews
Everyone's favorite Spartan is looking for a new purpose, lucky for him, the Commander his happy to oblige. (5-23-19 Info: On Hiatus after Chapter 45. Will update with schedule after life is in order.)
Crossover - Halo & Mass Effect - Rated: T - English - Chapters: 45 - Words: 495,928 - Reviews: 1677 - Favs: 2,363 - Follows: 2,926 - Updated: 5/23 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
Transcendent Humanity by
Solaris242 reviews
Humanity never developed FTL. The Prothean archives contained no technology, no Element Zero, just a warning. Isolated from the rest of the galaxy for two thousand years, restricted to their only system, how will humanity have changed when they first meet the Turians? AU, alternate history of humanity and First Contact.
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 18 - Words: 40,604 - Reviews: 2084 - Favs: 6,477 - Follows: 7,489 - Updated: 3/1/2016 - Published: 5/7/2013
Intertextus by
aaron vig reviews
Shepard had seen that the Reapers were coming, then the Heretics and the mercenary armies now sent to stop her. But she never could have predicted the other-world power and opportunity she'd be given... by Cortana and the Master Chief. Mass Effect/Halo
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 81,220 - Reviews: 368 - Favs: 698 - Follows: 795 - Updated: 7/16/2013 - Published: 5/5/2010 - Master Chief/John-117, Shepard (F)
You Can Read In Solitary, Degenerate! reviews
Hiccup gets sent to the Sips' Summer Slam prison. Don't ask.
Crossover - How to Train Your Dragon & Prison Architect - Rated: M - English - Humor/Romance - Chapters: 1 - Words: 1,495 - Reviews: 2 - Favs: 1 - Follows: 2 - Published: 8/8/2016 - Hiccup