[Shebang]

2,126 NES ROMS
TL;DR: I know there are only 700-odd official NES titles, but these include multiple regions. Beware, it's a massive post.

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[ J ]

Spoiler:

• J.League Fighting Soccer - The King of Ace Strikers (Japan)
  
• J.League Winning Goal (Japan)
  
• Jack Nicklaus' Greatest 18 Holes of Major Championship Golf
  
• Jack Nicklaus' Greatest 18 Holes of Major Championship Golf (Europe)
  
• Jackal
  
• Jackie Chan's Action Kung Fu
  
• Jackie Chan's Action Kung Fu (Europe)
  
• Jajamaru Gekimaden - Maboroshi no Kinmajou (Japan)
  
• Jajamaru Ninpou Chou (Japan)
  
• Jajamaru no Daibouken (Japan)
  
• James Bond Jr (Europe)
  
• James Bond Jr.
  
• Jangou (Japan)
  
• Jarinko Chie - Bakudan Musume no Shiawase Sagashi (Japan)
  
• Jaws
  
• Jeopardy!
  
• Jeopardy! 25th Anniversary Edition
  
• Jeopardy! Junior Edition
  
• Jesus - Kyoufu no Bio Monster (Japan)
  
• Jetsons - Cogswell's Caper!
  
• Jetsons, The - Cogswell's Caper! (Europe)
  
• Jetsons, The - Cogswell's Caper! (Japan)
  
• Jigoku Gokuraku Maru (Japan)
  
• Jikuu Yuuden - Debias (Japan)
  
• Jimmy Connor's Tennis
  
• Jimmy Connors Tennis (Europe)
  
• JJ - Tobidase Daisakusen Part 2
  
• Joe & Mac
  
• Joe & Mac - Caveman Ninja (Europe)
  
• John Elway's Quarterback
  
• Jongbou (Japan)
  
• Jordan vs. Bird - One on One
  
• Joshua
  
• Journey to Silius
  
• Journey to Silius (Europe)
  
• Joust
  
• Joust (Japan)
  
• Joy Mech Fight (Japan)
  
• JuJu Densetsu (Japan)
  
• Jumbo Ozaki no Hole in One Professional (Japan)
  
• Jumpin' Kid - Jack to Mame no Ki Monogatari (Japan)
  
• Jungle Book
  
• Jungle Book, The (Europe)
  
• Jurassic Park
  
• Jurassic Park (Europe)
  
• Just Breed
  
• Juuouki
  
• Juuryoku Soukou Metal Storm (Japan)
  
• Juvei Quest (Japan)
  

[ K ]

Spoiler:

• Kabuki - Quantum Fighter
  
• Kabuki - Quantum Fighter (Europe)
  
• Kabushiki Doujou (Japan)
  
• Kaettekita! Gunjin Shougi - Nanya Sore! (Japan)
  
• Kage (Japan)
  
• Kage no Densetsu (Japan)
  
• Kaguya Hime Densetsu (Japan)
  
• Kaijuu Monogatari (Japan)
  
• Kaiketsu Yanchamaru (Japan)
  
• Kaiketsu Yanchamaru 2 - Karakuri Land (Japan)
  
• Kaiketsu Yanchamaru 3 - Taiketsu! Zouringen (Japan)
  
• Kakefu Kun no Jump Tengoku - Speed Jigoku (Japan)
  
• Kame no Ongaeshi - Urashima Densetsu (Japan)
  
• Kamen no Ninja - Akakage (Japan)
  
• Kamen no Ninja - Hanamaru (Japan)
  
• Kamen Rider Club (Japan)
  
• Kamen Rider SD - Granshocker no Yabou (Japan)
  
• Kanshakudama Nage Kantarou no Toukaidou Gojuusan Tsugi (Japan)
  
• Karakuri Kengou Den - Musashi Road - Karakuri Nin Hashiru! (Japan)
  
• Karaoke Studio (Japan)
  
• Karaoke Studio Senyou Cassette Vol. 1 (Japan)
  
• Karaoke Studio Senyou Cassette Vol. 2 (Japan)
  
• Karate Champ
  
• Karate Kid
  
• Karateka (Japan)
  
• Karnov
  
• Kawa no Nushi Tsuri (Japan)
  
• Keiba Simulation - Honmei (Japan)
  
• Kekkyoku Nankyoku Daibouken (Japan)
  
• Kero Kero Keroppi no Daibouken (Japan)
  
• Kero Kero Keroppi no Daibouken 2 - Donuts Ike ha Oosawagi! (Japan)
  
• Keroppi to Keroriinu no Splash Bomb! (Japan)
  
• Kick Master
  
• Kick Off
  
• Kickle Cubicle
  
• Kickle Cubicle (Europe)
  
• Kid Icarus
  
• Kid Klown
  
• Kid Kool
  
• Kid Niki - Radical Ninja
  
• King Kong 2 - Ikari no Megaton Punch
  
• King Neptune's Adventure
  
• King of Kings
  
• King's Knight
  
• King's Knight (Japan)
  
• King's Quest V
  
• Kings of the Beach
  
• Kinnikuman - Muscle Tag Match (Japan)
  
• Kirby's Adventure
  
• Kirby's Adventure (Canada)
  
• Kirby's Adventure (Europe)
  
• Kirby's Adventure (France)
  
• Kirby's Adventure (Germany)
  
• Kiteretsu Dai Hyakka (Japan)
  
• Kiwi Kraze - A Bird-Brained Adventure!
  
• Klash Ball
  
• Klax
  
• Klax (Japan)
  
• Knight Rider
  
• Knight Rider (Europe)
  
• Knight Rider (Japan)
  
• Konami Hyper Soccer
  
• Konami Hyper Soccer (Europe)
  
• Konamic Sports in Seoul (Japan)
  
• Kouryuu Densetsu Villgust Gaiden (Japan)
  
• Koushien (Japan)
  
• Krazy Kreatures
  
• Krion Conquest
  
• Krusty's Fun House
  
• Krusty's Fun House (Europe)
  
• Kujaku Ou (Japan)
  
• Kujaku Ou 2 (Japan)
  
• Kung Fu
  
• Kung Fu (Europe)
  
• Kung-Fu Heroes
  
• Kunio Kun no Nekketsu Soccer League (Japan)
  
• Kurogane Hiroshi no Yosou Daisuki! - Kachiuma Densetsu (Japan)
  
• Kyonshiizu 2 (Japan)
  
• Kyoro Chan Land (Japan)
  
• Kyouryuu Sentai Juuranger (Japan)
  
• Kyuukyoku Harikiri Koushien (Japan)
  
• Kyuukyoku Harikiri Stadium (Japan)
  
• Kyuukyoku Harikiri Stadium - Heisei Gannen Ban (Japan)
  
• Kyuukyoku Harikiri Stadium 3 (Japan)
  
• Kyuukyoku Tiger (Japan)
  

[ L ]

Spoiler:

• L'Empereur
  
• Labyrinth
  
• Lagrange Point (Japan)
  
• Lasa-r Ishii no Childs Quest (Japan)
  
• Laser Invasion
  
• Last Action Hero
  
• Last Armageddon (Japan)
  
• Last Ninja
  
• Last Starfighter
  
• Law of the West (Japan)
  
• Lee Trevino's Fighting Golf
  
• Lee Trevino's Fighting Golf (Europe)
  
• Legacy of the Wizard
  
• Legend of Kage
  
• Legend of Prince Valiant
  
• Legend of Robin Hood, The
  
• Legend of the Ghost Lion
  
• Legend of Zelda
  
• Legend of Zelda, The (Europe)
  
• Legendary Wings
  
• Legends of the Diamond
  
• Lemmings
  
• Lemmings (Europe)
  
• Lethal Weapon
  
• Lethal Weapon (Europe)
  
• Life Force - Salamander (Europe)
  
• Lifeforce
  
• Linus Spacehead's Cosmic Crusade
  
• Lion King
  
• Lipple Island (Japan)
  
• Little League Baseball - Championship Series
  
• Little Magic
  
• Little Mermaid
  
• Little Mermaid - Ningyo Hime (Japan)
  
• Little Nemo - The Dream Master
  
• Little Nemo - The Dream Master (Europe)
  
• Little Ninja Brothers
  
• Little Ninja Brothers (Europe)
  
• Little Samson
  
• Little Samson (Europe)
  
• Lode Runner
  
• Lode Runner (Japan)
  
• Lone Ranger
  
• Loopz
  
• Lord of King (Japan)
  
• Lost Word of Jenny (Japan)
  
• Lot Lot (Japan)
  
• Low G Man
  
• Low G Man - The Low Gravity Man (Europe)
  
• Lunar Ball (Japan)
  
• Lunar Pool
  
• Lunar Pool (Europe)
  
• Lupin Sansei - Pandora no Isan (Japan)
  

[ M ]

Spoiler:

• M.C. Kids
  
• M.U.L.E.
  
• M.U.S.C.L.E.
  
• M82 Game Selectable Working Product Display (Europe)
  
• Mach Rider
  
• Mach Rider (Europe)
  
• Mad City (Japan)
  
• Mad Max
  
• Mafat Conspiracy - Golgo 13
  
• Magic Candle (Japan)
  
• Magic Darts
  
• Magic John (Japan)
  
• Magic Johnson's Fast Break
  
• Magic of Scheherazade
  
• Magical Doropie
  
• Magical Taruruuto Kun - Fantastic World!! (Japan)
  
• Magical Taruruuto Kun 2 - Mahou Daibouken (Japan)
  
• Magician
  
• Magmax
  
• Magmax (Japan)
  
• Magnum Kiki Ippatsu - Empire City - 1931 (Japan)
  
• Maharaja (Japan)
  
• Mahjong (Japan)
  
• Mahjong Club - Nagatachou (Japan)
  
• Mahjong G Men - Nichibutsu Mahjong III (Japan)
  
• Mahjong RPG Dora Dora Dora (Japan)
  
• Mahjong Taikai (Japan)
  
• Mahjong Taisen (Japan)
  
• Mahou no Princess Minky Momo - Remember Dream (Japan)
  
• Maison Ikkoku (Japan)
  
• Majaventure - Mahjong Senki (Japan)
  
• Majin Eiyuu Den Wataru Gaiden (Japan)
  
• Major League (Japan)
  
• Major League Baseball
  
• Majou Densetsu 2 - Daimashikyou Galious (Japan)
  
• Makai Island
  
• Makai-Mura (Japan)
  
• Maniac Mansion
  
• Maniac Mansion (Europe)
  
• Maniac Mansion (France)
  
• Maniac Mansion (Germany)
  
• Maniac Mansion (Italy)
  
• Maniac Mansion (Japan)
  
• Maniac Mansion (Spain)
  
• Maniac Mansion (Sweden)
  
• Mappy (Japan)
  
• Mappy Kids (Japan)
  
• Mappy-Land
  
• Mappy-Land (Japan)
  
• Marble Madness
  
• Marble Madness (Europe)
  
• Mario & Yoshi (Europe)
  
• Mario Bros. Classic (Europe)
  
• Mario is Missing!
  
• Mario is Missing! (Europe)
  
• Mario Open Golf (Japan)
  
• Mario's Time Machine!
  
• Marusa no Onna (Japan)
  
• Marvel's X-Men
  
• Mashin Eiyuu Den Wataru Gaiden (Japan)
  
• Mashou (Japan)
  
• Master Chu & The Drunkard Hu
  
• Masuzoe Youichi - Asa Made Famicom (Japan)
  
• Matendouji (Japan)
  
• Matsumoto Tooru no Kabushiki Hisshou Gaku (Japan)
  
• Matsumoto Tooru no Kabushiki Hisshou Gaku 2 (Japan)
  
• Max Warrior - Wakusei Kaigenrei (Japan)
  
• McDonaldland (Europe)
  
• McDonaldland (France)
  
• Mechanized Attack
  
• Mega Man
  
• Mega Man (Europe)
  
• Mega Man 2
  
• Mega Man 2 (Europe)
  
• Mega Man 3
  
• Mega Man 3 (Europe)
  
• Mega Man 4
  
• Mega Man 4 (Europe)
  
• Mega Man 5
  
• Mega Man 5 (Europe)
  
• Mega Man 6
  
• Meiji Ishin (Japan)
  
• Meikyuu Jima (Japan)
  
• Meikyuu Kumikyoku (Japan)
  
• Meimon! Dai San Yakyuu Bu (Japan)
  
• Meimon! Takonishi Ouendan - Kouha 6 Nin Shuu (Japan)
  
• Meitantei Holmes - Kiri no London Satsujin Jiken (Japan)
  
• Meitantei Holmes - M Kara no Chousenjou (Japan)
  
• Melville's Flame (Japan)
  
• Menace Beach
  
• Mendel Palace
  
• Mermaids of Atlantis
  
• Metal Fighter
  
• Metal Flame Psybuster (Japan)
  
• Metal Gear
  
• Metal Gear (Europe)
  
• Metal Max (Japan)
  
• Metal Mech
  
• Metal Slader Glory (Japan)
  
• Metal Storm
  
• Metro-Cross (Japan)
  
• Metroid
  
• Metroid (Europe)
  
• Mezase Pachi Pro - Pachio Kun (Japan)
  
• Mezase Top Pro - Green ni Kakeru Yume (Japan)
  
• Michael Andretti's World Grand Prix
  
• Mickey Mouse
  
• Mickey Mouse - Dream Balloon
  
• Mickey Mouse 3 - Yume Fuusen (Japan)
  
• Mickey Mousecapade
  
• Mickey's Adventures in Numberland
  
• Mickey's Safari in Letterland
  
• Micro Machines
  
• MiG 29 - Soviet Fighter
  
• Might and Magic (Japan)
  
• Might and Magic - Secret of the Inner Sanctum
  
• Mighty Bomb Jack
  
• Mighty Bomb Jack (Europe)
  
• Mighty Bomb Jack (Japan)
  
• Mighty Final Fight
  
• Mighty Final Fight (Europe)
  
• Mighty Final Fight (Japan)
  
• Mike Tyson's Punch-Out!!
  
• Mike Tyson's Punch-Out!! (Europe)
  
• Millipede
  
• Milon's Secret Castle
  
• Mindseeker (Japan)
  
• Minelvaton Saga (Japan)
  
• Mini Putt
  
• Minna no Taabou no Nakayoshi Daisakusen (Japan)
  
• Miracle Piano Teaching System
  
• Miracle Piano Teaching System, The (France)
  
• Miracle Piano Teaching System, The (Germany)
  
• Miracle Ropit's Adventure in 2100 (Japan)
  
• Mirai Senshi - Lios (Japan)
  
• Mirai Shinwa Jarvas (Japan)
  
• Mission Cobra
  
• Mission Impossible
  
• Mission Impossible (Europe)
  
• Mission Impossible (France)
  
• Mississippi Satsujin Jiken (Japan)
  
• Mito Koumon (Japan)
  
• Mitsume ga Tooru (Japan)
  
• Mizushima Shinji no Dai Koushien (Japan)
  
• Moai Kun
  
• Mobile Suit Z Gundam - Hot Scramble (Japan)
  
• Moe Pro! '90 - Kandou Hen (Japan)
  
• Moe Pro! - Saikyou Hen (Japan)
  
• Moero TwinBee - Cinnamon Hakase wo Sukue! (Japan)
  
• Moero!! Junior Basket - Two on Two (Japan)
  
• Moero!! Juudou Warriors (Japan)
  
• Moero!! Pro Soccer (Japan)
  
• Moero!! Pro Tennis (Japan)
  
• Moero!! Pro Yakyuu '88 - Ketteiban (Japan)
  
• Moero!! Pro Yakyuu (Japan)
  
• Moeru! Oniisan (Japan)
  
• Momotarou Densetsu (Japan)
  
• Momotarou Densetsu Gaiden (Japan)
  
• Momotarou Dentetsu (Japan)
  
• Money Game 2 - Kabutochou no Kiseki, The (Japan)
  
• Money Game, The (Japan)
  
• Monopoly
  
• Monopoly (France)
  
• Monopoly (Germany)
  
• Monopoly (Japan)
  
• Monster in My Pocket
  
• Monster Maker - 7 Tsu no Hihou (Japan)
  
• Monster Party
  
• Monster Truck Rally
  
• Moon Crystal
  
• Moon Ranger
  
• Morita Kazuo no Shougi (Japan)
  
• Mother (Japan)
  
• Motocross Champion
  
• Motor City Patrol
  
• Mottomo Abunai Deka (Japan)
  
• Mouryou Senki Madara (Japan)
  
• Mr. Gimmick
  
• Ms. Pac-Man
  
• Muppet Adventure - Chaos at the Carnival
  
• Musashi no Ken - Tadaima Shugyou Chuu (Japan)
  
• Mutant Virus
  
• My Life My Love - Boku no Yume - Watashi no Negai (Japan)
  
• Mystery Quest
  

[ N ]

Spoiler:

• Nagagutsu wo Haita Neko - Sekai Isshuu 80 Nichi Daibouken (Japan)
  
• Naitou 9 Dan - Shougi Hiden (Japan)
  
• Nakajima Satoru - F-1 Hero (Japan)
  
• Nakajima Satoru - F-1 Hero 2 (Japan)
  
• Nakayoshi to Issho (Japan)
  
• Namco Classic (Japan)
  
• Namco Classic 2 (Japan)
  
• Namcot Mahjong III - Mahjong Tengoku (Japan)
  
• Nangoku Shirei!! - Spy vs. Spy (Japan)
  
• Napoleon Senki (Japan)
  
• NARC
  
• Navy Blue (Japan)
  
• Nekketsu Kakutou Densetsu (Japan)
  
• Nekketsu Kouha - Kunio Kun (Japan)
  
• Nekketsu Koukou Dodgeball Bu (Japan)
  
• Nekketsu! Street Basket - Ganbare Dunk Heroes (Japan)
  
• Nemo - Pajama Hero (Japan)
  
• NES Controller Deck Test
  
• NES Open Tournament Golf
  
• NES Open Tournament Golf (Europe)
  
• NES Play Action Football
  
• NES Test Cart
  
• New Ghostbusters II
  
• New Ghostbusters II (Europe)
  
• New York Nyankies (Japan)
  
• New Zealand Story, The (Europe)
  
• NFL Football
  
• Nigel Mansell's World Championship Challenge
  
• Nigel Mansell's World Championship Racing (Europe)
  
• Nightmare on Elm Street
  
• Nightshade
  
• Nihonichi no Mei Kantoku (Japan)
  
• Niji no Silk Road (Japan)
  
• Ningen Heiki - Dead Fox (Japan)
  
• Ninja Cop Saizou (Japan)
  
• Ninja Crusaders
  
• Ninja Gaiden
  
• Ninja Gaiden 2 - The Dark Sword of Chaos
  
• Ninja Gaiden 3 - The Ancient Ship of Doom
  
• Ninja Hattori Kun (Japan)
  
• Ninja Jajamaru Kun (Japan)
  
• Ninja Kid
  
• Ninja Kun - Ashura no Shou
  
• Ninja Kun - Majou no Bouken (Japan)
  
• Ninja Ryukenden (Japan)
  
• Ninja Ryukenden II - Ankoku no Jashin Ken (Japan)
  
• Ninja Ryukenden III - Yomi no Hakobune (Japan)
  
• Ninjara Hoi! (Japan)
  
• Nintendo Test Cart
  
• Nintendo World Championships '90
  
• Nintendo World Cup
  
• Nintendo World Cup (Europe)
  
• Nishimura Kyoutarou Mystery - Blue Train Satsujin Jiken (Japan)
  
• Nishimura Kyoutarou Mystery - Super Express Satsujin Jiken (Japan)
  
• Noah's Ark
  
• Nobunaga no Yabou - Bushou Fuuun Roku (Japan)
  
• Nobunaga's Ambition
  
• Nobunaga's Ambition 2
  
• North & South
  
• North & South (Europe)
  
• Nuts & Milk (Japan)