The Lost and the Damned

Veldoran, Warlock of Craftworld Ulthwe, was having a bad day. Leader of the Eldar forces after the untimely fall of Farseer Idranel, he was conducting a retreat from Typhon Primaris in the face of Chaos remnants when he found himself thrown into a strange human world that knew not of the God-Emperor and the Imperium of Man. Now, he aids "Lone Wanderer" Lyra in her quest to find her father while he tries to find a way back. The other world is not taking his disappearance calmly, though.

The Lost and the Damned, also available on FanFiction.Net, is a Fallout 3/Warhammer 40000 crossover by Koronis/De La Chretiens.

Tropes in this fanfic:

 * Affably Evil: As in Fallout 3, President John Henry Eden, Eulogy Jones, Mr. Burke and Alistair Tenpenny.
 * Absolute Xenophobe: Averted. Lyra regards Veldoran as a close friend and ally..
 * Action Girl: Lyra, very much so. At current, she's a decent sniper trained in Eldar swordplay by a Warlock and a Howling Banshee Exarch(Who is, herself, a Action Girl)
 * After the End: Being Fallout AND Warhammer 40000 - very much so.
 * Aliens Are Bastards: Mostly Averted. Veldoran is a rather decent person to Lyra, but his arrogance sometimes gets the better of him.
 * All Love Is Unrequited: Lyra has a crush on Veldoran which . Partially averted with Jana Friedman for Protector Roger Sandoval, who feel for each other but refuse to pursue a relationship out of professionalism.
 * Exclusively Evil: Played straight with the Raiders.
 * Aristocrats Are Evil: Alistair *Wasteland Safari* Tenpenny.
 * The Atoner: Arguably Veldoran, who feels some justification for protecting Lyra despite the fact that she is one of the 'Mon-Keigh'.
 * Atop a Mountain of Corpses: With an Eldar Warlock on your side, is there really any doubt this would happen?
 * Authority Equals Asskicking: Veldoran. The Chaos Sorcerer Xenthus in the beginning. Protector Roger Sandoval.
 * Ax Crazy: Simco. And of course, various Slavers and Raiders.
 * Badass Adorable: Lyra, very much so.
 * Badass Normal: Lyra, considering that she can KEEP UP with Veldoran's killing sprees. Roger Sandoval, for being able to withstand.
 * Bad Boss: Alistair Tenpenny.
 * Berserk Button: Hurt Lyra and Veldoran will melt your brain..
 * BFG: Lyra's sniper rifle.
 * Bishonen: Veldoran.
 * Blood Knight: Raiders.
 * Brainwashed and Crazy: Simco, AND HOW.
 * Can't Argue with Elves: Averted, Veldoran and Lyra argue ALL THE TIME, with neither side gaining any significant moral advantage over each other.
 * Continuity Nod: Tonnes from Warhammer 40k, including
 * Crapsack World: Duh.
 * Crippling Overspecialisation: Averted by Lyra. She's a sniper and an amateur swordswoman, though not as good as an Eldar, as Ilrissa is fond of pointing out.
 * Depraved Bisexual: Simco has raped several men and women before, and when he gets captured....
 * Determinator: Sandoval. He'll keep taunting you even while he's in horrific amounts of pain, and still be able laugh it off.
 * Fish Out of Temporal Water: Veldoran.
 * Foe Yay: One of the Enclave scientists has feelings for Sandoval, up to the point of physically acting on them.
 * Four Lines, All Waiting: While Lyra and Veldoran's quest is the main plotline, there are others running concurrently, including:
 * The Eldar search for Veldoran.
 * The goings-on of various others in the Capital Wasteland.
 * Gaunt's Ghosts in the search for General Lugo, who has been captured by Eldar.
 * Friendly Sniper: Lyra favours sniping. To the point where the Talon Company know (and fear) her for it. She is also quite chatty, though a little over-opinionated and childish at times.
 * Genki Girl: Lyra, to a certain extent.
 * Genre Blind: Leaving  for dead. He survives, of course.
 * Invincible Hero: Averted. One would think that the Warlock would be one in this context...
 * Knight Templar: The Brotherhood Outcast leader Sandoval. To the point where he frowns on fraternizing with a female member of his task-force who has already professed her interest in him.
 * Sealed Good in a Can: Ilrissa in her soul-stone.
 * Shout-Out: A recent update (Chapter 38) had a Star Trek-themed shout out in the Vril crew and their ship Ycktyluk.
 * Smug Snake: Colonel Augustus Autumn. Until  pisses him off.
 * Too Dumb to Live: The Talon Company mercs. They voluntarily attack a girl who can drill a hole in their heads from a kilometre away, who is protected by an alien psychic who has spent a significant portion of his life fighting wars in a universe where having psychic powers almost guarantees a horrific death.
 * Unresolved Sexual Tension: Oodles between Lyra and Veldoran.