[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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[ O ]

Spoiler:

• Obake no Q Tarou - Wanwan Panic (Japan)
  
• Obocchama Kun (Japan)
  
• Oeka Kids - Anpanman no Hiragana Daisuki (Japan)
  
• Oeka Kids - Anpanman to Oekaki Shiyou!! (Japan)
  
• Oishinbo (Japan)
  
• Olympus no Tatakai (Japan)
  
• Onyanko Town (Japan)
  
• Operation Secret Storm
  
• Operation Wolf
  
• Operation Wolf (Europe)
  
• Orb 3D
  
• Osomatsu Kun (Japan)
  
• Otaku no Seiza - An Adventure in the Otaku Galaxy (Japan)
  
• Othello
  
• Outlanders (Japan)
  
• Over Horizon
  
• Over Horizon (Japan)
  
• Overlord
  

[ P ]

Spoiler:

• P'radikus Conflict
  
• P.O.W. - Prisoners of War (Europe)
  
• Paaman - Enban wo Torikaese!! (Japan)
  
• Paaman Part 2 - Himitsu Kessha Madoodan wo Taose! (Japan)
  
• Pac-Land (Japan)
  
• Pac-Man
  
• Pac-Man (Europe)
  
• Pac-Man (Japan)
  
• Pachi Com (Japan)
  
• Pachi-Slot Adventure 2 - Sorotta Kun no Pachi Slot Tanteidan (Japan)
  
• Pachi-Slot Adventure 3 - Bitaoshii 7 Kenzan! (Japan)
  
• Pachinko Daisakusen (Japan)
  
• Pachinko Daisakusen 2 (Japan)
  
• Pachio Kun 2 (Japan)
  
• Pachio Kun 3 (Japan)
  
• Pachio Kun 4 (Japan)
  
• Pachio Kun 5 (Japan)
  
• Pajama Hero - Nemo (Japan)
  
• Palamedes
  
• Palamedes 2 - Star Twinkles (Japan)
  
• Panic Restaurant
  
• Panic Restaurant (Europe)
  
• Paperboy
  
• Paperboy (Europe)
  
• Paperboy (Japan)
  
• Paperboy 2
  
• Parallel World (Japan)
  
• Parasol Henbee (Japan)
  
• Parasol Stars - The Story of Bubble Bobble 3
  
• Paris-Dakar Rally Special (Japan)
  
• Parodius
  
• Parodius da! (Japan)
  
• Peepar Time (Japan)
  
• Penguin Kun Wars
  
• Perfect Bowling (Japan)
  
• Perfect Fit
  
• Perman - Enban wo Torikaese!! (Japan)
  
• Perman Part 2 - Himitsu Kessha Madoodan wo Taose! (Japan)
  
• Pescatore (Japan)
  
• Pesterminator - The Western Exterminator
  
• Peter Pan & The Pirates
  
• Phantom Air Mission (Europe)
  
• Phantom Fighter
  
• Pictionary
  
• Pin-Bot (Europe)
  
• Pinball
  
• Pinball Quest
  
• Pinball Quest (Australia)
  
• Pinball Quest (Japan)
  
• Pinbot
  
• Pipe Dream
  
• Pirates!
  
• Pirates! (Europe)
  
• Pirates! (Germany)
  
• Pizza Pop! (Japan)
  
• Plasma Ball (Japan)
  
• Platoon
  
• Pocket Monsters - Silver (China)
  
• Pocket Monsters - Yellow (China)
  
• Pocket Zaurus - Juu Ouken no Nazo (Japan)
  
• Pokemon Gold (China)
  
• Pooyan (Japan)
  
• Popeye
  
• Popeye no Eigo Asobi
  
• Portopia Renzoku Satsujin Jiken (Japan)
  
• POW - Prisoners of War
  
• Power Blade
  
• Power Blade (Europe)
  
• Power Blade 2
  
• Power Blazer
  
• Power Pad Dance Aerobics
  
• Power Pad Test
  
• Power Punch 2
  
• Power Soccer (Japan)
  
• Predator
  
• Predator (Japan)
  
• President no Sentaku (Japan)
  
• Prince of Persia
  
• Prince of Persia (Europe)
  
• Prince of Persia (France)
  
• Prince of Persia (Germany)
  
• Prince of Persia (Spain)
  
• Princess Tomato in Salad Kingdom
  
• Pro Action Replay
  
• Pro Sport Hockey
  
• Pro Wrestling
  
• Pro Wrestling (Europe)
  
• Pro Yakyuu - Family Stadium '87 (Japan)
  
• Pro Yakyuu - Family Stadium '88 (Japan)
  
• Pro Yakyuu - Family Stadium (Japan)
  
• Pro Yakyuu Satsujin Jiken! (Japan)
  
• Probotector
  
• Probotector II - Return of the Evil Forces
  
• Project Q (Japan)
  
• Punch-Out!!
  
• Punch-Out!! (Europe)
  
• Punch-Out!! (Japan) (Gold Edition)
  
• Punisher
  
• Puss 'n Boots - Pero's Great Adventure
  
• Puyo Puyo (Japan)
  
• Puzslot (Japan)
  
• Puzznic
  
• Puzznic (Europe)
  
• Puzznic (Japan)
  
• Pyokotan no Dai Meiro (Japan)
  

[ Q ]

Spoiler:

• Q-bert
  
• Qix
  
• Quarter Back Scramble (Japan)
  
• Quarth (Japan)
  
• Quattro Adventure
  
• Quattro Arcade
  
• Quattro Sports
  
• Quest of Ki (Japan)
  
• Quinty (Japan)
  

[ R ]

Spoiler:

• R.C. Pro-Am (Europe)
  
• R.C. Pro-Am II (Europe)
  
• Race America
  
• Racer Mini Yonku - Japan Cup (Japan)
  
• Racket Attack
  
• Racket Attack (Europe)
  
• Rackets & Rivals
  
• Rad Racer
  
• Rad Racer (Europe)
  
• Rad Racer 2
  
• Rad Racket - Deluxe Tennis II
  
• Radia Senki - Reimei Hen (Japan)
  
• Raf World (Japan)
  
• Raid 2020
  
• Raid on Bungeling Bay
  
• Raid on Bungeling Bay (Japan)
  
• Rainbow Islands - The Story of Bubble Bobble 2
  
• Rainbow Islands - The Story of Bubble Bobble 2 (Europe)
  
• Rainbow Islands - The Story of Bubble Bobble 2 (Japan)
  
• Rally Bike
  
• Rambo
  
• Rambo (Japan)
  
• Rampage
  
• Rampart
  
• Rampart (Europe)
  
• Rampart (Japan)
  
• RBI Baseball
  
• RBI Baseball 2
  
• RBI Baseball 3
  
• RC Pro-Am
  
• RC Pro-Am 2
  
• Red Ariimaa 2 (Japan)
  
• Reigen Doushi (Japan)
  
• Remote Control
  
• Ren & Stimpy Show
  
• Renegade
  
• Rescue - The Embassy Mission
  
• Rescue - The Embassy Mission (Europe)
  
• Ring King
  
• River City Ransom
  
• Road Fighter (Europe)
  
• Road Fighter (Japan)
  
• Road Runner
  
• RoadBlasters
  
• RoadBlasters (Europe)
  
• Robin Hood - Prince of Thieves
  
• Robin Hood - Prince of Thieves (Europe)
  
• Robin Hood - Prince of Thieves (Germany)
  
• Robin Hood - Prince of Thieves (Spain)
  
• Robo Warrior
  
• Robo Warrior (Europe)
  
• Robocco Wars (Japan)
  
• Robocop
  
• RoboCop (Europe)
  
• RoboCop (Japan)
  
• Robocop 2
  
• RoboCop 2 (Europe)
  
• RoboCop 2 (Japan)
  
• Robocop 3
  
• RoboCop 3 (Europe)
  
• RoboCop versus The Terminator
  
• Robodemons
  
• Rock 'n' Ball
  
• Rocket Ranger
  
• Rocketeer
  
• Rockin' Kats
  
• Rockin' Kats (Europe)
  
• Rockman (Japan)
  
• Rockman 2 - Dr. Wily no Nazo (Japan)
  
• Rockman 3 - Dr. Wily no Saigo! (Japan)
  
• Rockman 4 - Aratanaru Yabou!! (Japan)
  
• Rockman 5 - Blues no Wana! (Japan)
  
• Rockman 6 - Shijou Saidai no Tatakai!! (Japan)
  
• Rod Land
  
• Rod Land Featuring Rit and Tam (Europe)
  
• Roger Clemens MVP Baseball
  
• Rokudenashi Blues (Japan)
  
• Rollerball
  
• Rollerball (Australia)
  
• Rollerball (Japan)
  
• Rollerblade Racer
  
• Rollergames
  
• Rollergames (Europe)
  
• Rolling Thunder
  
• Romance of the Three Kingdoms
  
• Romance of the Three Kingdoms II
  
• Romancia
  
• Roundball - 2-on-2 Challenge
  
• Roundball - 2-on-2 Challenge (Europe)
  
• Route-16 Turbo (Japan)
  
• Royal Blood (Japan)
  
• RPG Jinsei Game (Japan)
  
• Rush'n Attack
  
• Rush'n Attack (Europe)
  
• Rygar
  
• Rygar (Europe)
  

[ S ]

Spoiler:

• Saint Seiya - Ougon Densetsu (Japan)
  
• Saint Seiya - Ougon Densetsu Kanketsu Hen (Japan)
  
• Saiyuuki World (Japan)
  
• Saiyuuki World 2 - Tenjoukai no Majin (Japan)
  
• Sakigake!! Otoko Juku - Shippuu Ichi Gou Sei (Japan)
  
• Salad no Kuni no Tomato Hime (Japan)
  
• Salamander (Japan)
  
• Samurai Zombie Nation
  
• Sanada Juu Yuushi (Japan)
  
• Sangokushi (Japan)
  
• Sangokushi - Chuugen no Hasha (Japan)
  
• Sangokushi 2 (Japan)
  
• Sangokushi 2 - Haou no Tairiku (Japan)
  
• Sanma no Mei Tantei (Japan)
  
• Sanrio Carnival (Japan)
  
• Sanrio Carnival 2 (Japan)
  
• Sanrio Cup - Pon Pon Volley (Japan)
  
• Sansaara Naaga (Japan)
  
• Sansuu 1 Nen - Keisan Game (Japan)
  
• Sansuu 2 Nen - Keisan Game (Japan)
  
• Sansuu 3 Nen - Keisan Game (Japan)
  
• Sansuu 4 Nen - Keisan Game (Japan)
  
• Sansuu 5 & 6 Nen - Keisan Game (Japan)
  
• Satomi Hakkenden (Japan)
  
• Satsui no Kaisou - Power Soft Satsujin Jiken (Japan)
  
• Satsujin Club (Japan)
  
• Scarabeus
  
• SCAT - Special Cybernetic Attack Team
  
• SD Battle Oozumou - Heisei Hero Basho (Japan)
  
• SD Gundam - Gachapon Senshi 2 - Capsule Senki (Japan)
  
• SD Gundam - Gachapon Senshi 3 - Eiyuu Senki (Japan)
  
• SD Gundam - Gachapon Senshi 4 - NewType Story (Japan)
  
• SD Gundam - Gachapon Senshi 5 - Battle of Universal Century (Japan)
  
• SD Gundam Gaiden - Knight Gundam Monogatari (Japan)
  
• SD Gundam Gaiden - Knight Gundam Monogatari 2 - Hikari no Kishi (Japan)
  
• SD Gundam Gaiden - Knight Gundam Monogatari 3 - Densetsu no Kishi Dan (Japan)
  
• SD Hero Soukessen - Taose! Aku no Gundan (Japan)
  
• SD Keiji - Blader (Japan)
  
• SD Sengoku Bushou Retsuden (Japan)
  
• Section Z
  
• Section-Z
  
• Section-Z (Europe)
  
• Seicross
  
• Seikima II - Akuma no Gyakushuu (Japan)
  
• Seirei Densetsu Lickle (Japan)
  
• Seirei Gari (Japan)
  
• Seiryaku Simulation - Inbou no Wakusei - Shancara (Japan)
  
• Sekiryuuou (Japan)
  
• Senjou no Ookami (Japan)
  
• Sensha Senryaku - Sabaku no Kitsune (Japan)
  
• Sesame Street - Big Bird's Hide & Speak
  
• Sesame Street 123
  
• Sesame Street ABC
  
• Sesame Street ABC - 123
  
• Sesame Street Countdown
  
• Shadow Brain (Japan)
  
• Shadow of the Ninja
  
• Shadow Warriors
  
• Shadow Warriors Episode II - The Dark Sword of Chaos
  
• Shadowgate
  
• Shadowgate (Europe)
  
• Shadowgate (France)
  
• Shadowgate (Germany)
  
• Shadowgate (Japan)
  
• Shadowgate (Sweden)
  
• Shaffle Fight (Japan)
  
• Shanghai (Japan)
  
• Shanghai 2 (Japan)
  
• Shatterhand
  
• Shatterhand (Europe)
  
• Sherlock Holmes - Hakushaku Reijou Yuukai Jiken (Japan)
  
• Shikinjou (Japan)
  
• Shin 4 Nin Uchi Mahjong - Yakuman Tengoku (Japan)
  
• Shin Jinrui - The New Type (Japan)
  
• Shin Moero!! Pro Yakyuu (Japan)
  
• Shin Satomi Hakken-Den - Hikari to Yami no Tatakai (Japan)
  
• Shingen the Ruler
  
• Shingen The Ruler
  
• Shinobi
  
• Shinsenden (Japan)
  
• Shockwave
  
• Shooting Range
  
• Short Order - Eggsplode
  
• Shougi Meikan '92 (Japan)
  
• Shougi Meikan '93 (Japan)
  
• Shougun (Japan)
  
• Shoukoushi Ceddie (Japan)
  
• Shounen Ashibe - Nepal Daibouken no Maki (Japan)
  
• Shufflepuck Cafe (Japan)
  
• Side Pocket
  
• Side Pocket (Europe)
  
• Side Pocket (Japan)
  
• Silent Assault
  
• Silent Service
  
• Silent Service (Europe)
  
• Silk Worm
  
• Silva Saga
  
• Silver Surfer
  
• Simpsons - Bart vs. the Space Mutants
  
• Simpsons - Bart vs. the World
  
• Simpsons - Bartman Meets Radioactive Man
  
• Simpsons, The - Bart vs. the Space Mutants (Europe)
  
• Simpsons, The - Bart vs. the World (Europe)
  
• Simpsons, The - Bartman Meets Radioactive Man (Europe)
  
• Skate or Die
  
• Skate or Die 2 - Double Trouble
  
• Skate or Die! (Europe)
  
• Ski or Die
  
• Ski or Die (Europe)
  
• Skull & Crossbones
  
• Sky Destroyer (Japan)
  
• Sky Kid
  
• Sky Kid (Japan)
  
• Sky Shark
  
• Slalom
  
• Slalom (Europe)
  
• Smash T.V. (Europe)
  
• Smash TV
  
• Smurfs
  
• Smurfs, The (Europe)
  
• Snake Rattle n Roll (Europe)
  
• Snake Rattle'n Roll
  
• Snake's Revenge
  
• Snake's Revenge (Europe)
  
• Snoopy's Silly Sports Spectacular
  
• Snow Bros (Japan)
  
• Snow Brothers (Europe)
  
• Snowboard Challenge (Europe)
  
• Soccer
  
• Soccer League - Winner's Cup (Japan)
  
• Softball Tengoku (Japan)
  
• Solar Jetman - Hunt for the Golden Warpship
  
• Solar Jetman - Hunt for the Golden Warpship (Europe)
  
• Solitaire
  
• Solomon's Key
  
• Solomon's Key (Europe)
  
• Solomon's Key 2
  
• Solomon's Key 2 (Europe)
  
• Solstice (Japan)
  
• Solstice - The Quest for the Staff of Demnos (Europe)
  
• Son Son (Japan)
  
• Sore Ike! Anapanman - Minna de Hiking Game! (Japan)
  
• Space Harrier (Japan)
  
• Space Hunter (Japan)
  
• Space Invaders (Japan)
  
• Space Shadow (Japan)
  
• Space Shuttle Project
  
• Spartan X (Japan)
  
• Spartan X 2
  
• Special Tag Team Pro Wrestling (Japan)
  
• Spelunker
  
• Spelunker 2 - Yuusha heno Chousen (Japan)
  
• Spider-Man - Return of the Sinister Six
  
• Spider-Man - Return of the Sinister Six (Europe)
  
• Spiritual Warfare
  
• Splatter House - Wanpaku Graffiti (Japan)
  
• Spot
  
• Spy Hunter
  
• Spy vs Spy (Europe)
  
• Spy vs. Spy
  
• Sqoon
  
• Square no Tom Sawyer (Japan)
  
• Squashed
  
• Stadium Events
  
• Stadium Events (Europe)
  
• Stanley - The Search for Dr. Livingston
  
• Star Force
  
• Star Force (Europe)
  
• Star Force (Japan)
  
• Star Gate (Japan)
  
• Star Luster (Japan)
  
• Star Soldier
  
• Star Soldier (Japan)
  
• Star Trek - 25th Anniversary
  
• Star Trek - The Next Generation
  
• Star Voyager
  
• Star Wars
  
• Star Wars (Europe)
  
• Star Wars (Japan)
  
• Star Wars - Empire Strikes Back
  
• Star Wars - The Empire Strikes Back (Europe)
  
• Star Wars - The Empire Strikes Back (Japan)
  
• Starship Hector
  
• Startropics
  
• Startropics (Europe)
  
• Startropics 2 - Zoda's Revenge
  
• Stealth ATF
  
• Stealth ATF (Europe)
  
• Sted - Iseki Wakusei no Yabou (Japan)
  
• Stick Hunter - Exciting Ice Hockey (Japan)
  
• Stinger
  
• Street Cop
  
• Street Fighter 2010
  
• Street Fighter 3
  
• Street Gangs
  
• Strider
  
• Study Box (Japan)
  
• Stunt Kids
  
• Sugoro Quest - Dice no Senshitachi (Japan)
  
• Suikoden - Tenmei no Chikai (Japan)
  
• Sukeban Deka 3 (Japan)
  
• Summer Carnival '92 - Recca
  
• Sunday Funday
  
• Sunman (Europe)
  
• Super Arabian (Japan)
  
• Super Black Onyx (Japan)
  
• Super C
  
• Super Cars
  
• Super Chinese (Japan)
  
• Super Chinese 2 - Dragon Kid (Japan)
  
• Super Chinese 3 (Japan)
  
• Super Contra (Japan)
  
• Super Dodge Ball
  
• Super Dyna'mix Badminton (Japan)
  
• Super Glove Ball
  
• Super Jeopardy!
  
• Super Mario Bros.
  
• Super Mario Bros. + Duck Hunt
  
• Super Mario Bros. + Duck Hunt (Europe)
  
• Super Mario Bros. + Duck Hunt + World Class Track Meet
  
• Super Mario Bros. + Tetris + Nintendo World Cup (Europe)
  
• Super Mario Bros. 2
  
• Super Mario Bros. 2 (Europe)
  
• Super Mario Bros. 3
  
• Super Mario Bros. 3 (Europe)
  
• Super Mario Bros. 3 (Japan)
  
• Super Mario USA (Japan)
  
• Super Mogura Tataki!! - Pokkun Mogurar (Japan)
  
• Super Momotarou Dentetsu (Japan)
  
• Super Off-Road
  
• Super Pang
  
• Super Pinball (Japan)
  
• Super Pitfall
  
• Super Real Baseball '88 (Japan)
  
• Super Rugby (Japan)
  
• Super Spike V'Ball
  
• Super Spike V'Ball (Europe)
  
• Super Spike V'Ball + Nintendo World Cup
  
• Super Sprint
  
• Super Spy Hunter
  
• Super Spy Hunter (Europe)
  
• Super Star Force (Japan)
  
• Super Team Games
  
• Super Turrican
  
• Super Xevious - Gump no Nazo (Japan)
  
• Superman
  
• Superstar Pro Wrestling (Japan)
  
• Swamp Thing
  
• Swamp Thing (Europe)
  
• SWAT - Special Weapons and Tactics (Japan)
  
• Sweet Home
  
• Sword Master
  
• Sword Master (Europe)
  
• Sword Master (Japan)
  
• Swords and Serpents
  
• Swords and Serpents (Europe)
  
• Swords and Serpents (France)