Master-lists are kinda handy.
Assassin's Creed:
Failed Synchronization.
Summary: A collection of weird oneshots.
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Devil May Cry:
Gen.
(Will be added once edited).
Pairings.
(Dante/Lady).
Because of You.
Summary: She was here for her motorbike, not because she grew attached to the person who made it explode. That pizza addict wasn't her type, honest. AU.
Till Hell Do Us Part.
Summary: She stands fascinated as a red demon moved with deadly grace, taking the last breaths away from a group of his own kind. AU DMC3.
(Vergil/Trish).
Teachings.
Summary: She guessed she could give the credit to its rightful owner.
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Gintama:
Gen.
The Me Who I hate (Shinpachi-centric).
Summary: He had killed. And he regretted nothing.
Pairings.
(Gintoki/Tsukuyo).
A Sober's Scars.
Summary: He eased her scars once upon a time, might as well ease his.
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Katekyo Hitman Reborn:
Gen.
Avoid Paperwork With My Dying Will.
Summary: In which Tsuna tries to ditch his job, only to fail. Epically.
Daily Life.
Mafia Shots.
Summary: Collection of random oneshots.
Disaster Web.
Summary: It all started when Tsuna thought of making a website to socialize with new people, naming it 'Vongola' based on his tutor's suggestion.
Elusive Lightning.
Summary: One was a somewhat spoiled brat, the other was a somewhat psychotic illusionist. They had no common grounds whatsoever.
Namimori's Mafia Boss.
Summary: I didn't choose the Mafia life, the Mafia life chose me.
Nintendo Hard.
Summary: Tsuna wasn't a sore loser, he couldn't say the same about his guardians and the Varia though.
Spin Your Wheels.
Summary: He was a mere salary-man, one that shouldn't be getting into the illegal world of underworld street racing.
The Tenth Solider.
Summary: To finally get some answers, Tsuna has to go through a lot of ordeals. The most difficult one was the Vongola, an organization that Reborn told him to join.
Tropes of Vongola.
Summary: Random drabbles inspired from TvTropes about the Tenth Generation Vongola.
We Are Falling.
Summary: Collection of short KHR drabbles with DMC quotations. Not a crossover.
Pairings.
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(Multi-pairings).
What We Seek.
Shot Through The Heart.
I Got My Eyes Set On You.
For Your Eyes Only (crackish Tsuna/All).
A Dress of Love (crackish Reborn/All).
(Dino/Yamamoto).
Translating Sushi.
Summary: "How can I tell you that I'm currently trying to court you?"
(Tsuna/Kyoko).
Giving Roses.
Summary: Kyoko gave him chocolate that day, and he was kind of depressed he didn't have roses to give her in exchange.
(Yamamoto/Tsuna).
A Moth To Flame.
Summary: Yamamoto thought that he was normal, but then he turned seventeen and dreams started.
Took Your Star Hostage.
Summary: Yamamoto, like most of the times with Tsuna, couldn't help but to smile fondly and accept.
(Hibari/Tsuna).
Brains On Fire Fascinate Me.
Summary: Minds make a person ponder on words, and minds make a person ponder on actions.
Hearts Over Cotton (Hibari/fem!Tsuna).
Summary: Hibari muses over hearts.
(Mukuro/Tsuna).
Just Unwrap It Already.
Summary: Through the years, Mukuro came to appreciate Tsuna's presents more.
Neighbor Before Home.
Summary: They say that before you look for a place to live in, you should check for who lives next door.
(Gokudera/Tsuna).
Dieci Tempeste.
Summary: Ten times they caused storms to erupt in each other, storms that made path for a clear sky.
Horror Movie Cliches.
Summary: "It's not a good strategic move to walk into the woods when it's dark."
Like A Record Baby.
Summary: Collection of somewhat short 5927/2759 oneshots.
Twenty Fireworks And So (Tsuna/fem!Gokudera).
Summary: An AU oneshot dump for 27fem!59.
You know You Can't Deny.
Summary: In which Mukuro plays the matchmaker, Tsuna is confused and Gokudera is oblivious.
(Reborn/Luce).
Why You're Ruling Me.
Summary: A series of oneshots with different settings, times and universes. All about Reborn x Luce.
Crossovers:
(Gintama/KHR).
I'm Walking On Sunshine.
Summary: It was a meeting of two, bright suns.
To Be Shounen.
Summary: As they both continued reading each other's manga, they discovered that they really didn't fit into the Shounen Hero's trope.
(KHR/Maid-Sama).
Control Freaks.
Summary: It was a meeting of two demonic beings.
(Devil May Cry/Death Note).
Self Destruct.
Summary: "You and I are different. You think some humans are filth, while I think all of them are. You think they need a beginning, while I think they need an end." The way he said 'Humans' was somewhat unnerving; like he wasn't human himself.
(Devil May Cry/KHR).
Public's Enemies.
Summary:So they were stuck on a strange city with a trigger-happy demon hunter in charge of their training. Reborn, now you're just being absurd.
The Damned's Duels.
Summary: "Up for a duel?"