Video Games/Fanfic

Ace Attorney

 * A Complete Turnabout
 * Irya Sheen Ace Attorney
 * The Rest of the Pieces

Animal Crossing

 * The Terrible Secret of Animal Crossing (a Let's Play)

Bioshock

 * Fan Futuristics (Not a fanfic per se, but it contains a variety of stories set within the BS universe.)

Cave Story

 * Doukutsu Days

Command and Conquer

 * Tiberium Wars

Chrono Trigger

 * Crimson Echoes

Dead Rising

 * Airduct Anecdotes Anthology

Dead Space

 * Isaac Clarke's Last Stand

Dept Heaven

 * Dept Heaven Apocrypha

Disgaea

 * Fail to The King!

Doom

 * Doom: Repercussions of Evil

Donkey Kong Country

 * Diddys Kong Quest

.hack

 * .hack GU the Staircase To Nowhere

Dragon Age

 * Life on Thedas
 * Dragon Age the Crown of Thorns

Earthbound

 * The Chosen Four
 * Fobbies Are Borange
 * Harmony
 * Sunflower and Blade
 * Tree From My Youth
 * Trouble in Osohe Castle
 * Urfbowd My Verson

Eve Online

 * Clear Skies

Fallout

 * Justifying the Ends
 * New California Dreaming
 * Trouble

Fate/stay night

 * Chaos Theory
 * From Fake Dreams
 * Fate/Re:Trace
 * I Put On My Robe and Wizard Hat
 * Fate/Phantoms
 * Tainted Ideals
 * The Hound and The Blacksmith
 * The Letter Series

FIFA '11

 * The Miracle of Swindon Town

Fire Emblem

 * Spellbinding Radiance

Final Fantasy

 * Chocobo Nights (Final Fantasy VII)
 * Final Fantasy VIII: The Altimate Rewrite (Final Fantasy VIII)
 * Final Fighting Fantasy (Final Fantasy I to VII)
 * Go Not Gently (Final Fantasy IX)
 * The Lion of Ivalice (Final Fantasy Tactics)
 * Origins (Final Fantasy IX)
 * Shards of Memory (Dissidia Final Fantasy)
 * Twin-Lance Verse (Final Fantasy VIII)
 * Ultimate Utopia XXIII (Fan video spoof of the entire series)
 * A Angle Is With Us (Final Fantasy VII)
 * The Tainted Grimoire (Final Fantasy Tactics A2)

Free Space

 * Derelict

Gears of War

 * Phalanx

Ghost Trick

 * Twisted Fates

Half-Life

 * Half Life Full Life Consequences
 * Quarter Life Halfway to Destruction

Halo

 * The Battle of New Mombasa
 * Enemy of My Enemy
 * The Forgotten Spartans
 * Halo: Halos in Space
 * Halo: the Art of War
 * Je Mourrais
 * The Life
 * New Mombasa Drop
 * Halo Combat Deformed

Hitman

 * Hitman Miami

Jak and Daxter

 * Jak and Daxter Next Generation

Katawa Shoujo

 * Lilly Epilogue Family Matters
 * Reconciliation
 * Weekend At Hisaos

Kingdom Hearts

 * The Adventures of Kiko Fluffy Pants
 * Brutality
 * Fill the Moon
 * If I Was Your Nazi
 * Kingdom Hearts the Short And Honest Version
 * A Match Made in Hell
 * Naga Eyes
 * Other Halves and Other Tales
 * Power of the Soul
 * The Renegades
 * Those Lacking Spines
 * The Violet Room
 * Thronesofthe Four Pillars

Kirby

 * The Dream Land Story
 * Kirby vs. Shy Guy
 * Nightmarefics

Knights of the Old Republic

 * What Shines Through}

Left 4 Dead

 * Left 2 Die 4 ever
 * Respect a Woman
 * Two Step

The Legend of Zelda

 * Awesomeness of the Ocarina: The Shameless Deconstruction and Parody of a Well Respected Game (Ocarina of Time Parody and Deconstruction)
 * Desert Fortress
 * Exoria (hinted to be a metasequel)
 * Fortitude
 * The Great Desert (futurefic)
 * Group of Weirdos (Ocarina of Time and Majora's Mask)
 * Insomnia (Majora's Mask)
 * Legend of Zelda Rings of Dualty
 * Legend of Zelda the Return
 * Legend of Zelda Sacred Reliquary
 * The Light of Courage (Parody fan animations)
 * My Inner Life (Ocarina of Time)
 * My Inner Life Adaptations
 * Parallel Legends
 * Til the Sun Grows Cold and the Stars Grow Old and its sequel (during and after Twilight Princess)
 * Time Cannot Erase(supposedly a crossover with Fire Emblem Akaneia and Elibe but see In Name Only)
 * Under the Great Tree (Skyward Sword)
 * Winds of a New Beginning
 * Zelda UO

Mass Effect

 * Inglorious Boshtets
 * Project Gethinator
 * Interstitium
 * Mass Vexations
 * Masses to Masses
 * Mass Effect Interregnum
 * Mock Effect
 * Parallel Realities
 * Spiritof Redemption
 * Victor Shepardverse

Mega Man

 * Legacy of Metal
 * Mega Man Iris
 * Next Era
 * Rise of the Chosen
 * Rockman the Robot War
 * The Omega Chronicles
 * Mega Man Recut
 * Mega Man Defender of the Human Race

Metal Gear

 * Metal Gear Solid: Philanthropy
 * Stray
 * The Joy of Battle: Historical Espionage Action

Mitadake High

 * Bloody Saint

Modern Warfare

 * Beta Threat
 * Modurn Warfare 3 The Dead Rise
 * The Adventures of Captain Soap

No More Heroes

 * Bloody Way

Parappa the Rapper

 * A Boy in Parappa Town

Persona

 * Death and Ker (Persona 3)
 * Elysion (Persona 3 and Persona 4)
 * Fairly English Story (Shin Megami Tensei, Persona 3)
 * Lusnati Style (Persona 3)
 * My Life Is a Goddamn Mess, (Persona 3), also a Let's Play.
 * Simulacrum, (Persona 4)
 * Persona Non Grata
 * A Fool Named Fortune (Persona 3)
 * The Fools Tournament (Persona 3)

Prototype

 * Hunger

Portal

 * Test of Humanity
 * ITS MY LIFE!
 * Blue Sky
 * Being Human
 * Portal 3
 * The Punishment
 * While We Were Young

Quake

 * Quake the Epic Figth!

Quake III Arena

 * Arenas

Red Dead Redemption

 * Red Dead John Merston the Return And Dislike

Resident Evil

 * Fun with Leon and Ashley
 * Resident Evil a Change In Pace
 * Resident Evil Stay Alive
 * Things Better Left Untouched
 * Torment
 * Two Weeks Notice

The Settlers: Rise of an Empire

 * The Settlers Rise of an Empire

The Sims

 * Strangetown Here We Come

Sly Cooper

 * Raccoon
 * Iguana

Sonic the Hedgehog

 * Adventures of Mario and Sonic
 * Dark Chao Adventures
 * Inescapable Past
 * Shadow Chao Adventures
 * Training Tails
 * The Gloves Are Off

Spyro the Dragon

 * The Blue Dragon
 * The Purple Essence
 * The Legend of Spyro a New Dawn

Starcraft

 * Next Steps

Streets of Rage

 * Streets of Rage Saga

Super Mario Bros.

 * Adventures of Mario and Sonic
 * Better Off Alone
 * Clash of the Elements
 * It Sucks to Be Weegee
 * Koopa Quest
 * Lemmy's Land
 * More Than You Know
 * The Never Ending Mario Story
 * Paper Mario: The Temple of the Sun
 * The World of Facebook Mushroom Kingdom Style

Super Robot Wars

 * Super Robot Wars High
 * Super Robot Wars Original Generation 3 A

Super Smash Bros

 * Attack of Giygas
 * Life Aboard the Halberd
 * The Subspace Emissarys Worlds Conquest
 * Super Smash Stadium
 * What Goes On
 * Smash School

Tales (series)

 * Radiant Mythology II (not to be confused with the actual game of the same name)

Team Fortress 2

 * Devil With A Blue Dress
 * TEEN FORTRESS 2
 * The Nucleus Incident
 * The Only Family We Have
 * Respawn of the Dead
 * With Apologies to Harlan Ellison

Touhou

 * Average Joe in Bullet Hell
 * Crossing the Border
 * Imperfect Metamorphosis
 * Komeiji Koishi no Dokidoki Daibouken
 * Touhou Doujin Dawitsus Folly
 * Touhou Musou Kakyou
 * Touhou Ibunshu
 * Yuyukos Wonderful Midnight Snack Tour
 * Touhou Tonari
 * Life of Maid

Total War

 * A Scotsman in Egypt
 * I Am Skantarios
 * Land of the Aryans

Umineko no Naku Koro ni

 * Sillyhat Productions
 * When the Mountain Goats Cry

Valkyria Chronicles

 * The Destiny of Marcelina Lamterb

Victoria an Empire Under The Sun

 * Fire Warms the Northern Lands

The World Ends With You

 * Eri's Game
 * The World Ends with Sho

World of Warcraft

 * A New World
 * Cold Comfort Castle
 * Children of the Stars
 * A Death Knight Story
 * Diplomacy
 * Ethereum Gladiator
 * Travels Through Azeroth and Outland