Castelau
Fandoms
Recent works
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Project Sunseeker (Improved Version) by Castelau
Fandoms: Mass Effect Trilogy, Mass Effect - All Media Types
29 Jun 2026
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Summary
It’s remarkably hard to work out where you are without a single map reference point to rely upon. Even worse, when all your preconceptions about the universe see themselves turned upside down and you're left without a point of reference for life itself.
Trapped in a ship orbiting a star on the wrong side of the galaxy, Shepard has to figure out a way to get home - now if only she knew why she was out here in the first place.First contact slow-burn shakarian AU with distant inspiration from "Project: Hail Mary", see authors note at beginning for full context.
**REWRITE OF AN EXISTING FIC**
Series
- Part 1 of A Point of Reference
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The Student by Castelau
Fandoms: Mass Effect - All Media Types, Mass Effect: Andromeda, Mass Effect Trilogy
02 Jun 2026
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Summary
2167 - Saren Arterius sources, recruits and takes on training one Avitus Rix for Special Tactics.
Or, badgered into taking on a student at long last, Saren grudgingly winds up with a government assigned best friend and it's maybe not the worst thing that's happened in either of their lives.
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The Longshot by Castelau
Fandoms: Mass Effect Trilogy, Mass Effect - All Media Types, Mass Effect: Andromeda
21 Feb 2026
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Summary
An elcor veterinarian is found brutally murdered at his own clinic. No motive, nothing to point towards his killer. It's up to Second Class Major Crimes Detective Castis Vakarian and his new partner - the newest addition to the Major Crimes team - to piece together both how and why someone would kill the beloved veterinarian before the rapidly cooling trail can be erased entirely. But if anyone does know why someone would harm the sweet-natured elcor, they're being kept quiet by fear, apathy or some combination of the two.
Only, the situation is set to become all the more complex as Castis' personal and professional lives are forced to collide explosively - and left with his reputation on the line twice, he finds himself betting pride, reputation and relationship on a longshot; that he can solve this one case. -
Icarus All Grown Up by Castelau for GrayWolph
Fandoms: Mass Effect Trilogy, Mass Effect - All Media Types
02 Nov 2025
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Summary
Maybe Icarus fell because he flew too close to the sun, but he'd have drowned just the same if he hadn't flown at all.
Some words, and the turian who said them, stick with Garrus both during and after his time on Omega, leading him to want to see the person who said them again.
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Raptor, Raptor by Castelau for NoisyNoiverns
Fandoms: Mass Effect Trilogy, Mass Effect - All Media Types, Mass Effect: Andromeda
31 Oct 2025
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Summary
On the comedown from a hard mission, Macen comes up with an idea to cheer Avitus up - a movie night with their best friends to make him feel better. The movie in question? Oh, just a classic little number involving some relatable protagonists, and we definitely don't mean the humans.
Recent series
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A Point of Reference by Castelau
Fandom Mass Effect - All Media Types, Mass Effect Trilogy, Mass Effect: Andromeda
29 Jun 2026
Summary
Project Sunseeker and its associated spinoff materials, not necessarily all in order.
"It’s remarkably hard to work out where in the universe you are without a single map reference point. Even worse, when all your preconceptions about the universe see themselves turned upside down and you're left without a point of reference for life itself."
This series follows a number of different viewpoints on the same events, some as snippets, some as full length fics in their own right.
- Words:
- 374,298
- Works:
- 8
- Bookmarks:
- 25
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The Trashbag's Wasteland of Prompts and Drabbles by Castelau
Fandom Mass Effect - All Media Types, Mass Effect Trilogy, Mass Effect: Andromeda
16 Jul 2024
Summary
Any easy way of collecting together prompts and drabbles from Tumblr and Discord without shoving them all in one bloated, multi-ship fic. Not in any particular order and to be expected to vary wildly in rating and content. Marked as gifts for the askers for the most part.
- Words:
- 11,532
- Works:
- 10
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The Places We'll Go by Castelau
Fandom Mass Effect - All Media Types, Mass Effect Trilogy, Mass Effect: Andromeda
27 Jun 2024
- Words:
- 296,443
- Works:
- 10
- Bookmarks:
- 2
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Trashbag's No-Reapers AU by Castelau
Fandom Mass Effect - All Media Types, Mass Effect Trilogy, Mass Effect: Andromeda
01 Dec 2023
- Words:
- 143,562
- Works:
- 7
- Bookmarks:
- 4
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Summary
In another universe, Macen survives the Scourge by lucky chance.
Oneshots and short prompts in a Macen lives!AU.
- Words:
- 30,865
- Works:
- 4
- Bookmarks:
- 2
Recent bookmarks
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Life Behind Enemy Lines by Otempora
Fandoms: Mass Effect Trilogy, Mass Effect - All Media Types
06 Dec 2023
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Summary
The Illusive Man leaned back in his chair and steepled his fingers. “We humans have a saying. The enemy of my enemy is my friend.”
Shepherd was familiar with the phrase, but turians didn’t think that way.
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Species swap AU, Human!Garrus/Turian!Shepard. ME2 retelling. Not a standalone.
Series
- Part 3 of Species Swap
- Language:
- English
- Words:
- 105,761
- Chapters:
- 32/32
- Comments:
- 456
- Kudos:
- 240
- Bookmarks:
- 37
- Hits:
- 10,773
Bookmarked by Castelau
15 Sep 2022
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Summary
The Reapers are defeated, and the galactic community is barely holding together after the presumed death of Commander Shepard and the disappearance of the Normandy. The return of both – with unexpected complications – prompts a whole lot of questions… and very few answers.
Update: Now includes podfic!
Series
- Part 1 of Every One That Asketh
- Language:
- English
- Words:
- 744,492
- Chapters:
- 185/?
- Comments:
- 2,588
- Kudos:
- 1,434
- Bookmarks:
- 322
- Hits:
- 103,363
Bookmarked by Castelau
18 Aug 2021
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Summary
~ Sequel to mafs: foundation ~
Keith and Shiro put themselves into the hands of science and were married within moments of meeting each other.
Lucky for them, science got it right and they are now adjusting to life as a married couple. They've made their commitments to each other twice over but forces outside their marriage are already threatening to chip away at the life they're building together.
Series
- Part 2 of married at first sight
Bookmarked by Castelau
09 Mar 2019
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Summary
{Previously "married at first sight"}
Lance thinks Keith needs some romance in his life– but he knows Keith won’t go looking for it on his own so he signs Keith up for a unique experiment designed to determine if science can predict true love.
The Holt siblings think Shiro works too hard and under that very capable façade lies a soft heart that just needs a bit of love. They’re skeptical of the experiment’s professed success rate but they encourage Shiro to apply – it's all in the name of science after all.
~*~
[MAFS BLOG]
[MAFS PLAYLISTS]Series
- Part 1 of married at first sight
- Language:
- English
- Words:
- 334,102
- Chapters:
- 65/65
- Comments:
- 3,050
- Kudos:
- 2,720
- Bookmarks:
- 540
- Hits:
- 68,917
Bookmarked by Castelau
11 Dec 2018
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Summary
Captured by the Galra, Keith is given two choices- either lose himself to Haggar's experimentation, or take what might be his only chance at freedom- joining the Galra prince, Lotor. While he might not trust the prince, he'd rather take his chances with him than the witch- even if that means publicly betraying Voltron. It's not like he can go back anyways, after what Haggar did to him.
At least this way, he can keep a close eye on the Galra Prince- or at least, that's the plan. Actually carrying it out proves to be far more difficult than he could have expected, leading him to realize that the real threat might never have been Zarkon.
- Language:
- English
- Words:
- 153,899
- Chapters:
- 27/?
- Comments:
- 669
- Kudos:
- 1,112
- Bookmarks:
- 229
- Hits:
- 27,832
Bookmarked by Castelau
08 Dec 2018