| Name | Description | Year | Manufacturer | Rom | Clone | Sample |
| jsc_thom | Thomas & Friends - Learning Circus Express (Sharp Cookie) (PAL, UK) | 2007 | JAKKS Pacific Inc / Child Guidance / Pronto Games | | | |
| jsc_thomu | Thomas & Friends - Learning Circus Express (Sharp Cookie) (NTSC, US) | 2007 | JAKKS Pacific Inc / Child Guidance / Pronto Games | jsc_thom | jsc_thom | |
| jsk | Joryuu Syougi Kyoushitsu (Japan) | 1997 | Visco | | | |
| jspecter | Jatre Specter (set 1) | 1979 | Taito / Jatre | invaders | invaders | |
| jspecter2 | Jatre Specter (set 2) | 1979 | Taito / Jatre | invaders | invaders | |
| jst_l1 | Joust (L-1) | 1983 | Williams | jst_l2 | jst_l2 | genpin |
| jst_l2 | Joust (L-2) | 1983 | Williams | | | genpin |
| jt104 | JT 104 / NinjaKun Ashura no Shou | 1987 | UPL (United Amusements license) | ninjakd2 | ninjakd2 | |
| jtc | CompJU+TEr | 1987 | Jugend+Technik | | | |
| jtces23 | CompJU+TEr (ES 2.3) | 1989 | Jugend+Technik | jtc | jtc | |
| jtces40 | CompJU+TEr (ES 4.0) | 1990 | Jugend+Technik | jtc | jtc | |
| jtces88 | CompJU+TEr (EMR-ES 1988) | 1988 | Jugend+Technik | jtc | jtc | |
| jubileep | Double-Up Poker (Jubilee) | 1985 | Jubilee | | | |
| juicebox | Juice Box | 2004 | Mattel | | | |
| juju | JuJu Densetsu (Japan) | 1989 | TAD Corporation | toki | toki | |
| jujub | JuJu Densetsu (Playmark bootleg) | 1990 | bootleg (Playmark) | toki | toki | |
| jujuba | JuJu Densetsu (Japan, bootleg) | 1989 | bootleg | toki | toki | |
| juko16 | NEST 8086 and V30 | 198? | JUKO | ibm5150 | ibm5150 | |
| juko8 | NEST 8088 and V20 | 198? | JUKO | ibm5150 | ibm5150 | |
| juku | Juku E5104 | 1988 | EKTA | | | |
| juku_mouse | Juku E510x mouse | | | | | |
| jumanji | Jumanji (V502) | 2007 | I.A.M. | | | |
| jumanjia | Jumanji (V113) | 2007 | I.A.M. | jumanji | jumanji | |
| jumbogod | Jumbo Godzilla | 1995 | Namco | | | |
| jumpbean | Jumping Beans (0100161V, NSW/ACT) | 1996 | Aristocrat | aristmk5 | | |
| jumpbug | Jump Bug | 1981 | Hoei (Rock-Ola license) | | | |
| jumpbugb | Jump Bug (bootleg, set 1) | 1981 | bootleg | jumpbug | jumpbug | |
| jumpbugbc | Jump Bug (bootleg, set 3) | 1982 | bootleg (Cirsa) | jumpbug | jumpbug | |
| jumpbugbrf | Jump Bug (bootleg, set 2) | 1982 | bootleg (Recreativos Franco) | jumpbug | jumpbug | |
| jumpcoas | Jump Coaster (World) | 1983 | Kaneko Elc. Co. | | | |
| jumpcoasa | Jump Coaster | 1983 | Kaneko | jumpcoas | jumpcoas | |
| jumpcoast | Jump Coaster (Taito) | 1983 | Kaneko (Taito license) | jumpcoas | jumpcoas | |
| jumping | Jumping (set 1) | 1989 | bootleg | rbisland | rbisland | |
| jumpinga | Jumping (set 2) | 1988 | bootleg (Seyutu) | rbisland | rbisland | |
| jumpingi | Jumping (set 3, Imnoe PCB) | 1988 | bootleg (Seyutu) | rbisland | rbisland | |
| jumpjkpt | Jumping Jackpots (Russia) (Atronic) | 2002 | Atronic | | | |
| jumpjoey | Jumpin' Joeys (0100383V, NSW/ACT) | 1996 | Aristocrat | aristmk5 | | |
| jumpjoeyu | Jumpin' Joeys (DHG4735-02, US) | 1999 | Aristocrat | jumpjoey | jumpjoey | |
| jumpjump | Jump Jump | 1999 | dgPIX Entertainment Inc. | | | |
| jumpkids | Jump Kids | 1993 | Comad | | | |
| jumpkun | Jump Kun (prototype) | 1984 | Kaneko | | | |
| jumppop | Jumping Pop (set 1) | 2001 | ESD | | | |
| jumppope | Jumping Pop (set 2) | 2001 | Emag Soft | jumppop | jumppop | |
| jumpshot | Jump Shot | 1985 | Bally Midway | | | |
| jumpshotp | Jump Shot Engineering Sample | 1985 | Bally Midway | jumpshot | jumpshot | |
| junai | Junai - Manatsu no First Kiss (Japan) | 1998 | Nichibutsu/eic | nichidvd | | |
| junai2 | Junai 2 - White Love Story (Japan) | 1998 | Nichibutsu/eic | nichidvd | | |
| jungjuic | Jungle Juice (0200240V, ASP) | 1996 | Aristocrat | aristmk5 | | |
| jungleani | Jungle's Animals (v3.0) | 1999 | New Impeuropex Corp. / New Chitarrina | | | |
| jungleby | Jungle Boy (bootleg) | 1982 | bootleg | junglek | junglek | |
| jungleh | Jungle Hunt (US) | 1982 | Taito America Corporation | junglek | junglek | |
| junglehbr | Jungle Hunt (Brazil) | 1983 | Taito do Brasil | junglek | junglek | |
| junglek | Jungle King (Japan) | 1982 | Taito Corporation | | | |
| junglekas | Jungle King (alternate sound) | 1982 | Taito Corporation | junglek | junglek | |
| junglekj2 | Jungle King (Japan, earlier) | 1982 | Taito Corporation | junglek | junglek | |
| junglekj2a | Jungle King (Japan, earlier, alt) | 1982 | Taito Corporation | junglek | junglek | |
| jungler | Jungler | 1981 | Konami | | | |
| junglero | Jungler (Olympia) | 1981 | Konami (Olympia license) | jungler | jungler | |
| junglers | Jungler (Stern Electronics) | 1981 | Konami (Stern Electronics license) | jungler | jungler | |
| jungleyo | Jungle (Italy VI3.02) | 2001 | Yonshi | | | |
| jungsub | Jungler (Subelectro, bootleg on Scramble hardware) | 1981 | bootleg (Subelectro) | jungler | jungler | |
| junior | Junior Computer | 1980 | Elektor | | | |
| junior80 | Junior 80 | 1988 | <unknown> | | | |
| juno106 | Juno-106 Programmable Polyphonic Synthesizer | 1984 | Roland | | | |
| juno6 | Juno-6 (JU-6) Polyphonic Synthesizer | 1982 | Roland | | | |
| junofrst | Juno First | 1983 | Konami | | | |
| junofrstg | Juno First (Gottlieb) | 1983 | Konami (Gottlieb license) | junofrst | junofrst | |
| jupace | Jupiter Ace | 1981 | Jupiter Cantab | | | |
| jupiter2 | Jupiter II | 1976 | Wave Mate | | | |
| jupiter3 | Jupiter III | 1976 | Wave Mate | | | |
| jupk_305 | Jurassic Park (USA 3.05, display A4.00) | 1993 | Data East | jupk_513 | jupk_513 | genpin |
| jupk_307 | Jurassic Park (USA 3.07, display A4.00) | 1993 | Data East | jupk_513 | jupk_513 | genpin |
| jupk_501 | Jurassic Park (USA 5.01, display A5.01) | 1993 | Data East | jupk_513 | jupk_513 | genpin |
| jupk_501g | Jurassic Park (USA 5.01, display G5.01) | 1993 | Data East | jupk_513 | jupk_513 | genpin |
| jupk_513 | Jurassic Park (USA 5.13, display A5.10) | 1993 | Data East | | | genpin |
| jurassic99 | Jurassic 99 (Cadillacs and Dinosaurs bootleg with EM78P447AP) | 1993 | bootleg | dino | dino | |
| juwel | Juwel | 1988 | ADP | | | |
| jv880 | JV-880 Multi Timbral Synthesizer Module | 1992 | Roland | | | |
| jvchc7gb | HC-7E / HC-7GB (MSX1, Europe) | 1985 | JVC | | | |
| jvs_master | JVS MASTER | | | | | |
| jvs_port | JVS IO Port | | | | | |
| jvs13551 | Sega 837-13551 I/O Board | | | | | |
| jwildb52 | Joker's Wild (B52 system, BP55114-V1104, Ver.054NMV) | 199? | Sigma | | | |
| jwildb52a | Joker's Wild (B52 system, WP02001-054, Ver.031WM) | 1989 | Sigma | jwildb52 | jwildb52 | |
| jwildb52h | Joker's Wild (B52 system, BP55114-V1104, Ver.054NMV, Harrah's GFX) | 199? | Sigma | jwildb52 | jwildb52 | |
| jwj403tg | J-403TG | 199? | Jetway | ibm5170 | ibm5170 | |
| jwj446a | J-446A | 199? | Jetway | | | |
| jx10 | JX-10 Super JX Polyphonic Synthesizer | 1986 | Roland | | | |
| jx3p | JX-3P Programmable Preset Polyphonic Synthesizer | 1983 | Roland | | | |
| jx8p | JX-8P Polyphonic Synthesizer (Ver. 3.x) | 1985 | Roland | | | |
| jx8p_synth | Roland JX-8P Synthesizer Board | | | | | |
| jx8po | JX-8P Polyphonic Synthesizer (Ver. 2.x) | 1985 | Roland | jx8p | jx8p | |
| jxry | Jixiang Ruyi (V116CN) | 200? | IGS | | | |
| jxzh | Jinxiu Zhonghua | 1996 | BMC | | | |
| jy_03 | Junk Yard (0.3) | 1996 | Williams | jy_12 | jy_12 | |
| jy_11 | Junk Yard (1.1) | 1996 | Williams | jy_12 | jy_12 | |
| jy_12 | Junk Yard (1.2) | 1996 | Williams | | | |
| jyangoku | Jyangokushi: Haoh no Saihai (Japan 990527) | 1999 | Capcom | | | |
| jzst | Jue Zhan Shanghai Tan | 2006 | Sealy | fkddz2 | fkddz2 | |
| jzth | Juezhan Tianhuang | 2000 | <unknown> | | | |
| jzuanshi | Jin Zuanshi | 2003 | Sealy | | | |
| k001005 | Konami 001005 Polygon Renderer | | | | | |
| k001006 | Konami 001006 Texel Unit | | | | | |
| k001604 | Konami 001604 2D tilemaps + 2x ROZ | | | | | |
| k005289 | Konami 005289 SCC | | | | | |
| k005849 | Konami 005849 Video Controller | | | | | |
| k007121 | Konami 007121 Video Controller | | | | | |
| k007232 | Konami 007232 PCM Controller | | | | | |
| k007342 | Konami 007342 Video Controller | | | | | |
| k007420 | Konami 007420 Sprite Generator | | | | | |
| k033906 | Konami 033906 PCI bridge | | | | | |
| k037122 | Konami 037122 2D Tilemap | | | | | |
| k051316 | Konami 051316 PSAC | | | | | |
| k051649 | Konami 051649 SCC1 | | | | | |
| k051733 | Konami 051733 math chip | | | | | |
| k051960 | Konami 051960 Sprite Generator | | | | | |
| k052109 | Konami 052109 Tilemap Generator | | | | | |
| k053244 | Konami 053244/053245 Sprite Generator | | | | | |
| k053247 | Konami 053246/053247 Sprite Generator | | | | | |
| k053250 | Konami 053250 LVC | | | | | |
| k053250ps | Konami Pirate Ship LVC | | | | | |
| k053251 | Konami 053251 Priority Encoder | | | | | |
| k053252 | Konami 053252 Timing/Interrupt Controller | | | | | |
| k053260 | Konami 053260 KDSC | | | | | |
| k053936 | Konami 053936 Video Controller | | | | | |
| k054000 | Konami 054000 Protection | | | | | |
| k054321 | Konami 054321 Maincpu-Soundcpu interface | | | | | |
| k054338 | Konami 054338 Mixer | | | | | |
| k054539 | Konami 054539 ADPCM | | | | | |
| k055555 | Konami 055555 Priority Encoder | | | | | |
| k055673 | Konami 055673 Sprite Generator | | | | | |
| k056230 | Konami 056230 LANC | | | | | |
| k056230_viper | Konami Viper LANC | | | | | |
| k056800 | Konami 056800 MIRAC | | | | | |
| k056832 | Konami 056832 Tilemap Generator | | | | | |
| k057714 | Konami 057714 GCU | | | | | |
| k1 | K1 Digital Multi-Dimensional Synthesizer | 1988 | Kawai Musical Instrument Manufacturing | | | |
| k1003 | K1003 | 1978 | Robotron | | | |
| k1135ab | K1135A/B Dual BRG | | | | | |
| k1801vm1 | K1801VM1 | | | | | |
| k1801vm2 | K1801VM2 | | | | | |
| k1ge | K1GE Monochrome Graphics + LCD | | | | | |
| k1m | K1m Digital Multi-Dimensional Synthesizer Module | 1988 | Kawai Musical Instrument Manufacturing | k1 | k1 | |
| k1r | K1r Digital Multi-Dimensional Synthesizer Module | 1988 | Kawai Musical Instrument Manufacturing | k1 | k1 | |
| k1rii | K1rII Digital Multi-Dimensional Synthesizer Module | 1989 | Kawai Musical Instrument Manufacturing | | | |
| k2000 | K2000 | 1990 | Kurzweil Music Systems | | | |
| k28 | K-2-8: Talking Learning Computer (model 7-232) | 1985 | Tiger Electronics | | | |
| k286i | 286i | 1985 | Kaypro | ibm5170 | ibm5170 | |
| k28o | K-2-8: Talking Learning Computer (model 7-230) | 1981 | Tiger Electronics | | | |
| k2ge | K2GE Color Graphics + LCD | | | | | |
| k4 | K4 16-bit Digital Synthesizer | 1989 | Kawai Musical Instrument Manufacturing | | | |
| k4r | K4r 16-bit Digital Synthesizer Module | 1989 | Kawai Musical Instrument Manufacturing | k4 | k4 | |
| k5 | K5 Digital Multi-Dimensional Synthesizer | 1987 | Kawai Musical Instrument Manufacturing | | | |
| k572cassslot | Konami 573 Cassette Slot | | | | | |
| k573_dio | Konami 573 digital I/O board | | | | | |
| k573cassx | Konami 573 Cassette X | | | | | |
| k573cassxi | Konami 573 Cassette XI | | | | | |
| k573cassy | Konami 573 Cassette Y | | | | | |
| k573cassyi | Konami 573 Cassette YI | | | | | |
| k573casszi | Konami 573 Cassette ZI | | | | | |
| k573fpga | Konami 573 Digital I/O FPGA | | | | | |
| k573kara | Konami 573 karaoke I/O board | | | | | |
| k573mcr | Konami 573 Memory Card Reader | | | | | |
| k573msu | Konami 573 Multi Session Unit | | | | | |
| k5m | K5m Digital Multi-Dimensional Synthesizer Module | 1987 | Kawai Musical Instrument Manufacturing | k5 | k5 | |
| k7_olym | Olympic Darts K7 (v3.11) | 1994 | K7 Kursaal / NMI Electronics | | | |
| k7_olym30 | Olympic Darts K7 (v3.00) | 1994 | K7 Kursaal / NMI Electronics | k7_olym | k7_olym | |
| k7659_keyboard | K7659 Keyboard | | | | | |
| k8915 | K8915 | 1982 | Robotron | | | |
| kabukikl | Far East of Eden - Kabuki Klash / Tengai Makyou - Shin Den | 1995 | Hudson | neogeo | | |
| kabukiz | Kabuki-Z (World) | 1988 | Kaneko / Taito Corporation Japan | | | |
| kabukizj | Kabuki-Z (Japan) | 1988 | Kaneko / Taito Corporation | kabukiz | kabukiz | |
| kageki | Kageki (World) | 1988 | Kaneko / Taito Corporation | | | |
| kagekih | Kageki (hack) | 1992 | hack | kageki | kageki | |
| kagekij | Kageki (Japan) | 1988 | Kaneko / Taito Corporation | kageki | kageki | |
| kagekiu | Kageki (US) | 1988 | Kaneko / Taito America Corporation (Romstar license) | kageki | kageki | |
| kaguya | Mahjong Kaguyahime (Japan 880521) | 1988 | Miki Syouji | | | |
| kaguya2 | Mahjong Kaguyahime Sono2 (Japan 890829) | 1989 | Miki Syouji | | | |
| kaguya2f | Mahjong Kaguyahime Sono2 Fukkokuban (Japan 010808) | 2001 | Miki Syouji | kaguya2 | kaguya2 | |
| kaimenhu | Kaimen Hu (BMC) | 1996 | BMC | | | |
| kaiserkn | Kaiser Knuckle (Ver 2.1O 1994/07/29) | 1994 | Taito Corporation Japan | | | |
| kaiserknj | Kaiser Knuckle (Ver 2.1J 1994/07/29) | 1994 | Taito Corporation | kaiserkn | kaiserkn | |
| kaitei | Kaitei Takara Sagashi | 1980 | K.K. Tokki | | | |
| kaiteids | Kaitei Daisensou (Japan) | 1993 | Irem | inthunt | inthunt | |
| kaitein | Kaitei Takara Sagashi (Namco license) | 1980 | K.K. Tokki (Namco license) | kaitei | kaitei | |
| kaiunqz | Kaiun Quiz (Japan, KW1/VER.A) | 1999 | Namco | | | |
| kajotcrd | Kajot Card (Version 1.01, Wien Euro) | 1993 | Amatic | | | |
| kakumei | Mahjong Kakumei (Japan) | 1990 | Jaleco | | | |
| kakumei2 | Mahjong Kakumei 2 - Princess League (Japan) | 1992 | Jaleco | | | |
| kamakazi3 | Kamakazi III (hack of 'Super Galaxians') | 1979 | hack | galaxian | galaxian | |
| kamenrid | Masked Riders Club Battle Race / Kamen Rider Club Battle Racer | 1993 | Banpresto | | | |
| kamikaze | Kamikaze | 1980 | Konami (Leijac Corporation license) | | | invaders |
| kamikazesp | Kamikaze (Euromatic S.A., Spanish bootleg of Scramble) | 1981 | bootleg (Euromatic S.A.) | scramble | scramble | |
| kamikazp | Kamikaze (Potomac Games, bootleg of Galaxian) | 1979 | bootleg (Potomac Games) | galaxian | galaxian | |
| kamikcab | Kamikaze Cabbie | 1984 | Data East Corporation | | | |
| kanatuen | Kanatsuen no Onna (Japan 880905) | 1988 | Panac | | | |
| kaneko_calc3 | Kaneko CALC3 MCU | | | | | |
| kaneko_grap2 | Kaneko GRAP2 | | | | | |
| kaneko_hit | Kaneko CALC Hitbox | | | | | |
| kaneko_kc002 | Kaneko KC002 Sprites | | | | | |
| kaneko_pandora | Kaneko PANDORA GFX | | | | | |
| kaneko_toybox | Kaneko Toybox MCU | | | | | |
| kaneko_view2 | Kaneko VIEW2 Tilemaps | | | | | |
| kaneko_vu002 | Kaneko VU002 Sprites | | | | | |
| kangaroo | Kangaroo | 1982 | Sun Electronics | | | |
| kangarooa | Kangaroo (Atari) | 1982 | Sun Electronics (Atari license) | kangaroo | kangaroo | |
| kangaroob | Kangaroo (bootleg) | 1982 | bootleg | kangaroo | kangaroo | |
| kangarool | Kangaroo (Löwen-Automaten) | 1982 | Sun Electronics (Löwen-Automaten license) | kangaroo | kangaroo | |
| kaos | Kaos | 1981 | Pacific Polytechnical Corp. (Game Plan license) | | | |
| karams | KaraokeMicro Star (France) | 2003 | IVL Technologies (Lexibook license) | | | |
| karamsg | Karaoke Microphone Pro / KaraokeMicro Star (Greece) | 2003 | IVL Technologies (Lexibook / Imago license) | | | |
| karatblz | Karate Blazers (World, set 1) | 1991 | Video System Co. | | | |
| karatblza | Karate Blazers (World, set 2) | 1991 | Video System Co. | karatblz | karatblz | |
| karatblzbl | Karate Blazers (bootleg with Street Smart sound hardware) | 1991 | bootleg | karatblz | karatblz | |
| karatblzj | Toushin Blazers (Japan, Tecmo license) | 1991 | Video System Co. (Tecmo license) | karatblz | karatblz | |
| karatblzt | Karate Blazers (World, Tecmo license) | 1991 | Video System Co. (Tecmo license) | karatblz | karatblz | |
| karatblzu | Karate Blazers (US) | 1991 | Video System Co. | karatblz | karatblz | |
| karateda | Karate Dou (Arfyc bootleg) | 1984 | bootleg (Arfyc) | kchamp | kchamp | |
| karatedo | Karate Dou (Japan) | 1984 | Data East Corporation | kchamp | kchamp | |
| karatevs | Taisen Karate Dou (Japan) | 1984 | Data East Corporation | kchampvs | kchampvs | |
| karatour | The Karate Tournament | 1992 | Mitchell | | | |
| karatourj | Chatan Yara Kuushanku - The Karate Tournament (Japan) | 1992 | Mitchell | karatour | karatour | |
| karatvst | KaraokeTV Star (US, with 50 songs) | 2002 | IVL Technologies | | | |
| karatvsta | KaraokeTV Star (US, with 25 songs, 'FREE 35 Hit Songs / $35 value' packaging) | 2002 | IVL Technologies | karatvst | karatvst | |
| karianx | Karian Cross (Rev. 1.0) | 1996 | Deniam | | | |
| karnov | Karnov (US, rev 6) | 1987 | Data East USA | | | |
| karnova | Karnov (US, rev 5) | 1987 | Data East USA | karnov | karnov | |
| karnovj | Karnov (Japan) | 1987 | Data East Corporation | karnov | karnov | |
| karnovjbl | Karnov (Japan, bootleg with NEC D8748HD) | 1987 | bootleg (K. J. Corporation) | karnov | karnov | |
| karnovr | Karnov's Revenge / Fighter's History Dynamite | 1994 | Data East Corporation | neogeo | | |
| karoas | Karo As | 1992 | ADP | | | |
| karous | Karous (Japan) (GDL-0040) | 2006 | Milestone | naomigd | | |
| kartduel | Kart Duel (World, KTD2/VER.A) | 2000 | Gaps / Namco | | | |
| kartduelja | Kart Duel (Japan, KTD1/VER.A) | 2000 | Gaps / Namco | kartduel | kartduel | |
| kas89 | Kasino '89 | 1989 | SFC S.R.L. | | | |
| katochan | Nihonzenkoku-katochan-no-kurukuru-ressya-de-Pe! (Ver.1.00, 2004/10/24) | 2004 | Capcom | | | |
| katori | Katori Attack (Japan, ver 1.03) | 2005 | Amuzy Corporation | | | |
| kattobas | Kattobase Power Pro Kun | 1998 | Konami | | | |
| kay1024 | Kay 1024 | 1998 | NEMO | spec128 | spec128 | |
| kaypro1 | Kaypro 1 | 1986 | Kaypro Corporation | kaypro484 | kaypro484 | |
| kaypro10 | Kaypro 10 - 1983 | 1983 | Non-Linear Systems | | | |
| kaypro1084 | Kaypro 10 | 1984 | Kaypro Corporation | kaypro10 | kaypro10 | |
| kaypro10kbd | Kaypro 10 Keyboard | | | | | |
| kaypro16 | Kaypro 16 | 1985 | Kaypro Corporation | ibm5150 | ibm5150 | |
| kaypro284 | Kaypro 2/84 | 1984 | Kaypro Corporation | kaypro484 | kaypro484 | |
| kaypro2x | Kaypro 2x | 1985 | Kaypro Corporation | kaypro484 | kaypro484 | |
| kaypro484 | Kaypro 4/84 | 1984 | Kaypro Corporation | | | |
| kaypro484p88 | Kaypro 4/84 plus88 | 1984 | Kaypro Corporation | kaypro484 | kaypro484 | |
| kaypro4x | Kaypro 4x | 1985 | Kaypro Corporation | robie | robie | |
| kayproii | Kaypro II - 2/83 | 1982 | Non-Linear Systems | | | |