NES ROMs
Browse and download NES games.
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| Obake no Q Tarou - Wanwan Panic (Japan) |
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| Obake no Q Tarou - Wanwan Panic (Japan) (En) |
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| Obocchama-kun (Japan) |
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| Obuchayushchiy Kartridzh (Russia) (Subor Keyboard) (Unl) |
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| Oeka Kids - Anpanman no Hiragana Daisuki (Japan) |
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| Oeka Kids - Anpanman to Oekaki Shiyou!! (Japan) |
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| Oishinbo - Kyuukyoku no Menu Sanbon Shoubu (Japan) |
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| Okkotoshi Puzzle - Tonjan! (Japan) |
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| Okkotoshi Puzzle - Tonjan! (Japan) (Beta) |
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| Oliver's Shell - An Adventure Story (World) (Aftermarket) (Unl) |
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| Olympic (Asia) (En) (Unlicensed) |
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| Olympic 2000 - 1000000-in-1 (Asia) (En) (Unlicensed) |
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| Olympic 2000 - 500-in-1 (Asia) (En) (FL-4466A) (Unlicensed) |
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| Olympic 2000 - 500-in-1 (Taiwan) (En) (Unlicensed) |
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| Olympic I.Q. (Asia) (Ja) (PAL) (Unl) |
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| Olympic I.Q. (Korea) (En) (Unl) |
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| Olympic I.Q. (Taiwan) (En) (Unl) |
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| Olympus no Tatakai (Japan) |
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| Omega Driver (World) (Proto) (2018-09-17) (Aftermarket) (Unl) |
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| Omega Driver (World) (Proto) (2018-11-05) (Aftermarket) (Unl) |
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| Once Upon a Time in China (World) (Aftermarket) (Unlicensed) |
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| Oneshot (World) (Proto) (Aftermarket) (Unl) |
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| Onyanko Town (Japan) |
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| Oof McBrewster's Haunted House Adventure (World) (Aftermarket) (Unl) |
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| Oopie's Quest (World) (v1.2.0) (Aftermarket) (Unl) |
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| Ooze Redux (World) (Demo) (Aftermarket) (Unl) |
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| Operation Secret Storm (USA) (Unl) |
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| Operation Wolf (Europe) |
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| Operation Wolf (Japan) |
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| Operation Wolf (USA) |
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| Oratorio (World) (Demo) (2022-08-26) (Aftermarket) (Unl) |
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| Oratorio (World) (Demo) (2022-09-01) (Byte-Off 2022) (Aftermarket) (Unl) |
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| Oratorio (World) (Demo) (2023-08-05) (Aftermarket) (Unl) |
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| Orb-3D (USA) |
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| Orebody - Binder's Tale (World) (Demo) (2021-10-31) (Aftermarket) (Unl) |
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| Orebody - Binder's Tale (World) (Demo) (2022-06-05) (Aftermarket) (Unl) |
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| Orebody - Binder's Tale (World) (Demo) (2022-09-29) (Aftermarket) (Unl) |
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| Orebody - Sand Ripples (World) (Aftermarket) (Unl) |
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| Os Cavaleiros do Zodiaco (Asia) (Ar) (Extract) (Mapper 187) (Unlicensed) |
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| Os Cavaleiros do Zodiaco (Asia) (Ar) (Extract) (Unl) |
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| Osomatsu-kun - Back to the Me no Deppa no Maki (Japan) |
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| Otaku no Seiza - An Adventure in the Otaku Galaxy (Japan) |
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| Othello (Asia) (En) (Unl) |
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| Othello (Australia) (Bit Corp.) (Unl) |
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| Othello (Australia) (HES) (Unl) |
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| Othello (Japan) |
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| Othello (Japan) (En) (HAL Laboratory) |
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| Othello (Japan) (En) (Rev 1) (Proto) (HAL Laboratory) |
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| Othello (Japan) (Rev 1) (Possible Proto) |
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| Othello (Taiwan) (En) (Bit Corp.) (Unl) |
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| Othello (USA) |
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| Othello (USA) (HAL Laboratory) |
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| Oulu Zhi Zhan (China) (Unlicensed) |
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| Ouroboros (World) (1JAM-Loop) (Aftermarket) (Unl) |
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| Ouroboros (World) (Ludum Dare 47) (Aftermarket) (Unl) |
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| Outlanders (Japan) |
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| Over Horizon - Fei Li Hangdao (Asia) (En) (Unlicensed) |
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| Over Horizon (Europe) |
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| Over Horizon (Japan) |
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| Over Horizon (Japan) (En) |
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| Overlord (USA) |
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| Overlord (USA) (Beta) |
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