Here's a list of all the lore-stories that I could find
This is an older version of the post. The one that I'll be updating is now here: http://boards.na.leagueoflegends.com/en/c/story-art/kJiEuXJA-a-list-of-every-story-i-could-find
I've sorted them by area or allegiance and listed the champions in the story. The stories labeled "Champion Pages" are unnamed stories that are found on a champion's page. I seriously doubt that these are all of the stories, so please put missing ones in the comments. I know that some stories appear more than once. For example, Kalista's stories are under Shadow Isles AND Independent.
I only put things here if they are in story format, so no champion backstory, just actual stories. Video = † - Journal or first-person = ∆ - Comic = º - Interactive = ^
Bandle City From the Journal of Professor Cecil B. Heimerdinger∆ (Donger
Bilgewater Burning Tides (TF, Graves, Gangplank, MF, Illaoi Shadow and Fortune (MF, Shad Isles Crew, Olaf, Lucian, Illaoi The Burden (Illaoi, Gangplank Trial of the Kraken Priestess^ (Illaoi The River King† (Tahm Kench
Demacia A Hero’s Callingº (Poppy Quinn’s Journal∆ (Quinn, Jarvan, Garen Journey into the Freljord∆ (Quinn, Ashe, Sej, Liss The Slayer (Poppy
Freljord Journey into the Freljord∆ (Quinn, Ashe, Sej, Liss, Trundle The Feats of Braum^ (Braum An Old Friend (Ryze
Independent Shadow and Fortune (MF, Shad Isles Crew, Olaf, Lucian Lucian: The Purifier’s Resolve† (Lucian Invocation (Kalista The Pledge† (Kalista Twin Dawns (Aurelion An Ancient Mystery in Runeterra† (Ezreal, Aatrox Forest for the Trees (Kindred A Good Death (Kindred Bard: Mountain (Bard The Wonder Above∆ (Bard The River King† (Tahm Kench Spirit Guard Udyr^ (Udyr Rek’sai: Scourge of the Desert∆ (Rek’Sai The Terror Beneath† (Rek’Sai Shadows and Reflections∆ (Lucian An Old Friend (Ryze
Ionia A Sword without a Sheath∆ (Yasuo “The Unforgiven” or “The Road to Ruin”∆ (Yasuo Bard: Mountain (Bard The Bird and the Branch (Taliyah, Yasuo Spirit Guard Udyr^ (Udyr
Mount Targon The Spear of Targon (Pantheon The Light Bringer (Leona Night’s Work (Diana Twin Dawns (Aurelion The Uninvited Guest (Taric The Ascentº (Taric
Noxus Reborn (Sion
Piltover Mayhem Everywhere You Look∆ (Vi, Jinx
Shadow Isles Shadow and Fortune (MF, Shad Isles Crew, Olaf, Lucian, Illaoi No One Lives (Hecarim Burial at Sea (Karthus Sermon of the Dead∆ (Karthus Invocation (Kalista Shadows of Damnation (Huehuehue The Collection (Thresh Lucian: The Purifier’s Resolve† (Lucian The Pledge† (Kalista Tales of the Black Mist: The Harrowing† Shadows and Reflections∆ (Lucian
Shurima Descent into the Tomb†∆ (Nasus, Sivir, Cass, Renek, Xerath Rise of the Ascended†∆ (Nasus, Sivir, Azir Arisen (Azir Unbound (Xerath, Azir, Nasus, Renekton Ouroborus (Nasus Darkness Renews (Renekton Water (Sivir Dreamsong (Skarner Greed and Tears (Amumu Caravan North (Rammus The Bird and the Branch (Taliyah, Yasuo Bloodline (Taliyah, Nasus, Sivir, Xerath Echoes in the Stone (Taliyah Rek’sai: Scourge of the Desert∆ (Rek’Sai The Terror Beneath† (Rek’Sai
Zaun H.I.V.E. Incident Report (Twitch Zaun Amorphous Combatant Lab Documents∆ (Zac Chronobreakº (Ekko Ekko: Seconds† (Ekko
Champion Pages Braum, the Heart of the Freljord Fiora, the Grand Duelist Gangplank, the Saltwater Scourge Gnar, the Missing Link (With Rengar Graves, the Outlaw Jhin, the Virtuoso [I-IV] (With Zed, Akali, Shen Shen, the Eye of Twilight Twisted Fate, the Card Master Miss Fortune, the Bounty Hunter Kled, the Cantankerous Cavalier (Kled
Recent Updates: Kled, the Cantankerous Cavalier in Champion Pages Added Bandle City (Idk how I forgot about that) and The Donger's journal to that Added The Slayer to Demacia
