| Name | Description | Year | Manufacturer | Rom | Clone | Sample |
| gauntlet2pr3 | Gauntlet (2 Players, rev 3) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletg | Gauntlet (German, rev 10) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletgr3 | Gauntlet (German, rev 3) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletgr6 | Gauntlet (German, rev 6) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletgr8 | Gauntlet (German, rev 8) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletj | Gauntlet (Japanese, rev 13) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletj12 | Gauntlet (Japanese, rev 12) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletr1 | Gauntlet (rev 1) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletr2 | Gauntlet (rev 2) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletr4 | Gauntlet (rev 4) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletr5 | Gauntlet (rev 5) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletr7 | Gauntlet (rev 7) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntletr9 | Gauntlet (rev 9) | 1985 | Atari Games | gauntlet | gauntlet | |
| gauntlets | Gauntlet (Spanish, rev 15) | 1985 | Atari Games | gauntlet | gauntlet | |
| gaxeduel | Golden Axe - The Duel (JUETL 950117 V1.000) | 1994 | Sega | stvbios | | |
| gayle | Amiga GAYLE | | | | | |
| gb_cart_slot | Game Boy Cartridge Slot | | | | | |
| gb_rom | Game Boy Flat ROM Cartridge | | | | | |
| gb_rom_bbd | Game Boy BBD Cartridge | | | | | |
| gb_rom_camera | Game Boy Camera Cartridge | | | | | |
| gb_rom_chongwu | Game Boy Chongwu Xiao Jingling Pokemon Pikecho Cartridge | | | | | |
| gb_rom_dshggb81 | Game Boy DSHGGB-81 Cartridge | | | | | |
| gb_rom_gbck003 | Game Boy GBCK003 Multi-Game Board | | | | | |
| gb_rom_huc1 | Game Boy Hudson Soft HuC1 Cartridge | | | | | |
| gb_rom_huc3 | Game Boy Hudson Soft HuC-3 Cartridge | | | | | |
| gb_rom_lasama | Game Boy Story of Lasama Cartridge | | | | | |
| gb_rom_licheng | Game Boy Li Cheng MBC5 Cartridge | | | | | |
| gb_rom_liebao | Game Boy Liebao Technology Cartridge | | | | | |
| gb_rom_m161 | Game Boy M161 Cartridge | | | | | |
| gb_rom_mbc1 | Game Boy MBC1 Cartridge | | | | | |
| gb_rom_mbc2 | Game Boy MBC2 Cartridge | | | | | |
| gb_rom_mbc3 | Game Boy MBC3 Cartridge | | | | | |
| gb_rom_mbc30 | Game Boy MBC30 Cartridge | | | | | |
| gb_rom_mbc5 | Game Boy MBC5 Cartridge | | | | | |
| gb_rom_mbc6 | Game Boy MBC6 Cartridge | | | | | |
| gb_rom_mbc7_2k | Game Boy MBC7 Cartridge with 93LC56 | | | | | |
| gb_rom_mbc7_4k | Game Boy MBC7 Cartridge with 93LC66 | | | | | |
| gb_rom_mmm01 | Game Boy MMM01 Cartridge | | | | | |
| gb_rom_ngbchk | Game Boy HK0701/HK0819 Cartridge | | | | | |
| gb_rom_ntnew | Game Boy newer Kasheng/Makon Cartridge | | | | | |
| gb_rom_rocket | Game Boy Rocket Games Cartridge | | | | | |
| gb_rom_rockman8 | Game Boy Rockman 8 Cartridge | | | | | |
| gb_rom_sachen1 | Game Boy Sachen MMC1 Cartridge | | | | | |
| gb_rom_sachen2 | Game Boy Sachen MMC2 Cartridge | | | | | |
| gb_rom_sintax | Game Boy Sintax MBC5 Cartridge | | | | | |
| gb_rom_slmulti | Game Boy SL Multi-Game Cartridge | | | | | |
| gb_rom_sm3sp | Game Boy Super Mario 3 Special Cartridge | | | | | |
| gb_rom_tama5 | Game Boy Bandai Tamagotchi Cartridge | | | | | |
| gb_rom_tfboot | Game Boy Telefang bootleg Cartridge | | | | | |
| gb_rom_vf001 | Game Boy Vast Fame VF001 Cartridge | | | | | |
| gb_rom_wisdom | Game Boy Wisdom Tree Cartridge | | | | | |
| gb_rom_yong | Game Boy Young Yong Cartridge | | | | | |
| gb50_150 | GB-50 Retro Station Pocket System | 2019 | <unknown> | | | |
| gba | Game Boy Advance | 2001 | Nintendo | | | |
| gba_cart_slot | Game Boy Advance Cartridge Slot | | | | | |
| gba_lcd | GBA LCD | | | | | |
| gba_rom | GBA Carts | | | | | |
| gba_rom_3dmatrix | 3D Matrix Memory Mapper | | | | | |
| gba_rom_boktai | GBA Carts + EEPROM 64K + RTC + Light Sensor | | | | | |
| gba_rom_drilldoz | GBA Carts + SRAM + Rumble | | | | | |
| gba_rom_eeprom | GBA Carts + EEPROM | | | | | |
| gba_rom_eeprom64 | GBA Carts + EEPROM 64K | | | | | |
| gba_rom_flash | GBA Carts + Panasonic Flash | | | | | |
| gba_rom_flash_rtc | GBA Carts + Panasonic Flash + RTC | | | | | |
| gba_rom_flash1m | GBA Carts + Sanyo Flash | | | | | |
| gba_rom_flash1m_rtc | GBA Carts + Sanyo Flash + RTC | | | | | |
| gba_rom_sram | GBA Carts + SRAM | | | | | |
| gba_rom_wariotws | GBA Carts + SRAM + Rumble + Gyroscope | | | | | |
| gba_rom_yoshiug | GBA Carts + EEPROM + Tilt Sensor | | | | | |
| gbbchmp | Great Bishi Bashi Champ (GBA48 VER. JAB) | 2002 | Konami | sys573 | | |
| gbcolor | Game Boy Color | 1998 | Nintendo | | | |
| gberet | Green Beret | 1985 | Konami | | | |
| gberetb | Green Beret (bootleg) | 1985 | bootleg | gberet | gberet | |
| gblchmp | Global Champion (Ver 2.1A 1994/07/29) | 1994 | Taito America Corporation | kaiserkn | kaiserkn | |
| gbmoney | The Good, The Bad & The Money (0351016, US) | 2002 | Aristocrat | aristmk6 | | |
| gbox2019 | Game Box 400 in 1 (2019 PCB) | 2019 | Sup | | | |
| gbox2020 | Game Box 400 in 1 (2020 PCB) | 2020 | Sup | gbox2019 | gbox2019 | |
| gbpocket | Game Boy Pocket | 1996 | Nintendo | gameboy | gameboy | |
| gbs5505x | Genius BrainStation 5505X (Germany) | 2001 | Video Technology | | | |
| gbsf | Gangbao Sifang | 2003 | Sealy | | | |
| gbusters | Gang Busters (set 1) | 1988 | Konami | | | |
| gbustersa | Gang Busters (set 2) | 1988 | Konami | gbusters | gbusters | |
| gc10a | EAGLEN486 GC10A | 199? | Eagle | ibm5170 | ibm5170 | |
| gcastle | Golden Castle (prototype?) | 1986 | Allumer / Taito Corporation | gladiatr | gladiatr | |
| gcbr | GameCube (Brazil) | 2002 | Nintendo | gcjp | gcjp | |
| gceu | GameCube (EUR) | 2002 | Nintendo | gcjp | gcjp | |
| gchgchmp | Gacha Gachamp (GE877 VER. JAB) | 1999 | Konami | sys573 | | |
| gchinatv | Golden China TV Game | 198? | Golden China | | | |
| gcjp | GameCube (Japan) | 2001 | Nintendo | | | |
| gckong | Crazy Kong (Gakken) | 1982 | Gakken | | | |
| gcm394 | GeneralPlus GPL16250 System-on-a-Chip | | | | | |
| gcm394_audio | SunPlus GCM394 System-on-a-Chip (Audio) | | | | | |
| gcm394_video | GeneralPlus GPL16250 System-on-a-Chip (Video) | | | | | |
| gcpinbal | Grand Cross (v1.02F) | 1994 | Excellent System | | | |
| gcs2mgp | Mini Game Player 48-in-1 | 200? | Jungle's Soft | | | |
| gcslottv | Gachinko Shoubu! PachisloTV (Japan) | 2002 | Takara / Sammy / DCT / SSD Company LTD | | | |
| gcus | GameCube (USA) | 2001 | Nintendo | gcjp | gcjp | |
| gdarius | G-Darius (Ver 2.02O) | 1997 | Taito | gdarius2 | gdarius2 | |
| gdarius2 | G-Darius Ver.2 (Ver 2.03J) | 1997 | Taito | coh1000t | | |
| gdariusg | G-Darius (VER 2.70G) | 2011 | bootleg (Arcade MOD BIOS) | coh3002t | | |
| gdariusj | G-Darius (Ver 2.01J) | 1997 | Taito | gdarius2 | gdarius2 | |
| gdariusu | G-Darius (Ver 2.02A) | 1997 | Taito | gdarius2 | gdarius2 | |
| gdefender | Defender (Gakken) | 1983 | Gakken | | | |
| gderby | Gran Derby (Spanish hack of Jockey Club) | 1990 | hack (CODERE) | jockeyc | jockeyc | |
| gdfs | Mobile Suit Gundam Final Shooting (Japan) | 1995 | Banpresto | | | |
| gdigdug | Dig Dug (Gakken) | 1983 | Gakken | | | |
| gdrom | GD-ROM | | | | | |
| gdrom_image | CD/GD-ROM Image | | | | | |
| gdvsgd | Gundam vs. Gundam (GVS1 Ver. A) | 2008 | Capcom / Bandai | sys256 | | |
| gdvsgdnx | Gundam vs. Gundam Next | 2009 | Capcom / Bandai | sys256 | | |
| ge5 | SGI Geometry Engine 5 | | | | | |
| gedmag_sound | Cedar Sound | | | | | |
| geebee | Gee Bee (Japan) | 1978 | Namco | | | |
| geebee_sound | Gee Bee Custom Sound | | | | | |
| geebeea | Gee Bee (UK) | 1978 | Namco (Alca license) | geebee | geebee | |
| geebeeb | Gee Bee (Europe) | 1978 | Namco (F.lli Bertolino license) | geebee | geebee | |
| geebeeg | Gee Bee (US) | 1978 | Namco (Gremlin license) | geebee | geebee | |
| geforce_7600gs | NVIDIA GeForce 7600GS | | | | | |
| geforce256 | nVidia GeForce 256 SDR (NV10) | | | | | |
| geforce256ddr | nVidia GeForce 256 DDR (NV10) | | | | | |
| gegege | GeGeGe no Kitarou Youkai Slot | 1997 | Sigma / Banpresto | | | |
| gegemdb | Gegege no Kitaro Yokai Yokocho Matsuri de Battle Ja (GYM1 Ver.A) | 2007 | Namco | | | |
| geimulti | GEI Multi Game | 1992 | Grayhound Electronics | | | |
| geisha | Geisha (0101153V, NSW/ACT) | 2001 | Aristocrat | aristmk5 | | |
| geishaa6 | Geisha (10000811, NSW/ACT) | 2000 | Aristocrat | aristmk6 | | |
| geishaa6a | Geisha (10122011, ASP) | 2001 | Aristocrat | geishaa6 | geishaa6 | |
| geishaa6b | Geisha (10112411, ASP) | 2001 | Aristocrat | geishaa6 | geishaa6 | |
| geishajc | Geisha - Jackpot Carnival (0351033, US) | 2001 | Aristocrat | geishaa6 | geishaa6 | |
| geishanz | Geisha (0101408V, New Zealand) | 2001 | Aristocrat | geisha | geisha | |
| gekimaka | Geki Makaimura | 2005 | Capcom | | | |
| gekiretu | Quiz Gekiretsu Scramble (Japan) | 1992 | Face | | | |
| gekiretup | Quiz Gekiretsu Scramble (Japan, prototype) | 1992 | Face | gekiretu | gekiretu | |
| gekiridn | Gekirindan (Ver 2.3O 1995/09/21) | 1995 | Taito Corporation | | | |
| gekiridnj | Gekirindan (Ver 2.3J 1995/09/21) | 1995 | Taito Corporation | gekiridn | gekiridn | |
| gekisha | Mahjong Gekisha (Japan) | 1989 | Dynax | | | |
| gekishap2 | Mahjong Gekisha Part II (Japan) | 1990 | Dynax | gekisha | gekisha | |
| gekisou | Gekisou (Japan) | 1985 | Eastern Corp. | | | equites |
| gekitsui | Gekitsui Oh (Japan) | 1985 | Data East Corporation | zerotrgt | zerotrgt | |
| gekpurya | Gekitou Pro Yakyuu Mizushima Shinji All Stars vs. Pro Yakyuu (Rev C) (GDT-0008C) | 2003 | Sega / Wow Entertainment | triforce | | |
| gekpuryb | Gekitou Pro Yakyuu Mizushima Shinji All Stars vs. Pro Yakyuu (Rev B) (GDT-0008B) | 2003 | Sega / Wow Entertainment | gekpurya | gekpurya | |
| gemcrush | Gemcrush (Japan, prototype) | 1996 | Star Fish | | | |
| gemini | Gemini Wing (World) | 1987 | Tecmo | | | |
| gemini2k | Gemini 2000 (set 1) | 1982 | Taito do Brasil | | | genpin |
| gemini2k1 | Gemini 2000 (set 2) | 1982 | Taito do Brasil | gemini2k | gemini2k | genpin |
| geminib | Gemini Wing (bootleg) | 1987 | bootleg | gemini | gemini | |
| geminij | Gemini Wing (Japan) | 1987 | Tecmo | gemini | gemini | |
| gen_nomd | Genesis Nomad (USA Genesis handheld) | 1995 | Sega | | | |
| gen32 | Mephisto Genius 68030 (v4.01) | 1993 | Hegener + Glaser | | | |
| gen32a | Mephisto Genius 68030 (v4.00) | 1993 | Hegener + Glaser | gen32 | gen32 | |
| gen32l | Mephisto Genius 68030 (London upgrade) | 1996 | Richard Lang | gen32 | gen32 | |
| generic_cartslot | Generic Cartridge Slot | | | | | |
| generic_fifo_u32_device | Generic fifo, u32 values | | | | | |
| generic_keyboard | Generic Keyboard | | | | | |
| generic_latch_16 | Generic 16-bit latch | | | | | |
| generic_latch_8 | Generic 8-bit latch | | | | | |
| generic_ram128l | Generic RAM 128K (linear mapping) | | | | | |
| generic_ram128p | Generic RAM 128K (plain mapping) | | | | | |
| generic_ram32l | Generic RAM 32K (linear mapping) | | | | | |
| generic_ram32p | Generic RAM 32K (plain mapping) | | | | | |
| generic_ram64l | Generic RAM 64K (linear mapping) | | | | | |
| generic_ram64p | Generic RAM 64K (plain mapping) | | | | | |
| generic_rom_linear | Generic ROM (linear mapping) | | | | | |
| generic_rom_plain | Generic ROM (plain mapping) | | | | | |
| generic_romram_plain | Generic ROM + RAM (plain mapping) | | | | | |
| generic_socket | Generic ROM Socket / RAM Socket | | | | | |
| generic_spi_flash | Generic SPI Flash handling | | | | | |
| generic_terminal | Generic Terminal | | | | | |
| genesis | Genesis (USA, NTSC) | 1989 | Sega | | | |
| genesis_tmss | Genesis (USA, NTSC, with TMSS chip) | 1990 | Sega | genesis | genesis | |
| genesisp | Genesis | 1986 | Gottlieb | | | genpin |
| genesispf | Genesis (French) | 1986 | Gottlieb | genesisp | genesisp | genpin |
| genesispg | Genesis (German) | 1986 | Gottlieb | genesisp | genesisp | genpin |
| geneve | Geneve 9640 | 1987 | Myarc | | | |
| geneve_gate_array | Geneve Gate Array | | | | | |
| geneve_pal | Geneve PAL circuit | | | | | |
| genie | Genie (ICP-1, set 1) | 198? | Video Fun Games Ltd. | | | |
| geniea | Genie (ICP-1, set 2) | 198? | <unknown> | genie | genie | |
| geniep | Genie (Pinball) | 1979 | Gottlieb | gts1 | | genpin |
| genius6 | Genius 6 (V110F) | 1998 | IGS | | | |
| genius6a | Genius 6 (V133F) | 1997 | IGS | genius6 | genius6 | |
| genius6b | Genius 6 (V132F) | 1997 | IGS | genius6 | genius6 | |
| geniuscps | Genio Color Pocket (Spanish) | 2013 | VTech | | | |
| genix | Genix Family | 1994 | NIX | | | |
| genmagi | Genie Magic (0200894V, NSW/ACT) | 1999 | Aristocrat | aristmk5 | | |
| genmod | Geneve 9640 Mod | 1990 | Myarc / Ron G. Walters | | | |
| genmod_decoder | GenMod decoder circuit | | | | | |
| genpeitd | Genpei ToumaDen | 1986 | Namco | | | |
| gensitou | Genshitou 1930's (Japan) | 1989 | SNK | prehisle | prehisle | |
| geostorm | Geo Storm (Japan, 014 sound CPU) | 1994 | Irem | gunforc2 | gunforc2 | |
| geostorma | Geo Storm (Japan, 026 sound CPU) | 1994 | Irem | gunforc2 | gunforc2 | |
| gepoker | Poker (Version 50.02 ICB, set 1) | 1984 | Greyhound Electronics | | | |
| gepoker1 | Poker (Version 50.02 ICB, set 2) | 1984 | Greyhound Electronics | gepoker | gepoker | |
| gepoker2 | Poker (Version 50.02 ICB, set 3) | 1984 | Greyhound Electronics | gepoker | gepoker | |
| gepoker3 | Poker (Version 50.02 ICB, set 4) | 1984 | Greyhound Electronics | gepoker | gepoker | |
| ges9051n | GES 9051N-386C VER -0.01 | 199? | <unknown> | ibm5170 | ibm5170 | |
| getaway | Get A Way (upright) | 1979 | Universal | | | |
| getbass | Get Bass: Sega Bass Fishing | 1997 | Sega | bassdx | bassdx | |
| getbassdx | Get Bass: Sega Bass Fishing Deluxe | 1997 | Sega | bassdx | bassdx | |
| getbassur | Get Bass: Sega Bass Fishing Upright | 1997 | Sega | bassdx | bassdx | |
| gete486vl | TurboExpress 486 VL | 199? | GENOA | ibm5170 | ibm5170 | |
| getrich | Get Rich (Version 1.0.1) | 200? | Amcoe | | | |
| getstarb1 | Get Star (bootleg set 1) | 1986 | bootleg | grdian | grdian | |
| getstarb2 | Get Star (bootleg set 2) | 1986 | bootleg | grdian | grdian | |
| getstarj | Get Star (Japan) | 1986 | Toaplan / Taito | grdian | grdian | |
| gew12 | Yamaha YMW728-F (GEW12) | | | | | |
| gew7 | Yamaha YMW270-F (GEW7) | | | | | |
| gew7_pcm | Yamaha GEW7 PCM | | | | | |
| gf1 | Gravis GF1 | | | | | |
| gf4500 | NVIDIA GoForce 4500 | | | | | |
| gfc1080 | GFC-1080 (MSX1, Korea) | 1985 | Goldstar | | | |
| gfc1080a | GFC-1080A (MSX1, Korea) | 1985 | Goldstar | | | |
| gfire2 | Golden Fire II | 1992 | Topis Corp | | | |
| gfootbal | Gaelco Football | 2002 | Gaelco / Zigurat | | | |
| gforce2 | Galaxy Force 2 | 1988 | Sega | | | |
| gforce2j | Galaxy Force 2 (Japan) | 1988 | Sega | gforce2 | gforce2 | |
| gforce2ja | Galaxy Force 2 (Japan, Rev A) | 1988 | Sega | gforce2 | gforce2 | |
| gforce2sd | Galaxy Force 2 (Super Deluxe unit) | 1988 | Sega | gforce2 | gforce2 | |
| gfxdecode | gfxdecode | | | | | |
| gfxultra | ATi Graphics Ultra Card | | | | | |
| gfxultrap | ATi Graphics Ultra Pro Card | | | | | |
| ggate | Golden Gate (set 1) (Bingo) | 19?? | Seeben (Belgium) | | | |
| ggatea | Golden Gate (set 2) (Bingo) | 19?? | Seeben (Belgium) | ggate | ggate | |
| ggconnie | Go! Go! Connie chan Jaka Jaka Janken | 1996 | Eighting | | | |
| ggdman | Go Go Dynaman | 1983 | Bandai | | | |
| gghost | Goalie Ghost | 1984 | Bally/Sente | | | |
| ggisuka | Guilty Gear Isuka | 2004 | Arc System Works / Sammy | awbios | | |
| ggm | Great Game Machine | 1980 | Applied Concepts / Chafitz | | | |
| ggoemon | Ganbare Goemon | 1997 | Konami | | | |
| ggram2 | Giant Gram: All Japan Pro Wrestling 2 (Japan) | 1999 | Sega | naomi | | |
| ggreats2 | Golfing Greats 2 (ver JAC) | 1994 | Konami | opengolf | opengolf | |
| gground | Gain Ground (World, 3 Players, Floppy Based, FD1094 317-0058-03d Rev A) | 1988 | Sega | | | |
| ggroundj | Gain Ground (Japan, 2 Players, Floppy Based, FD1094 317-0058-03b) | 1988 | Sega | gground | gground | |
| ggx | Guilty Gear X | 2000 | Arc System Works | naomi | | |
| ggx15 | Guilty Gear X ver. 1.5 | 2003 | Arc System Works / Sammy | awbios | | |
| ggxx | Guilty Gear XX (GDL-0011) | 2002 | Arc System Works | naomigd | | |
| ggxxac | Guilty Gear XX Accent Core (Japan) (GDL-0041) | 2006 | Arc System Works | naomigd | | |
| ggxxrl | Guilty Gear XX #Reload (Japan, Rev A) (GDL-0019A) | 2003 | Arc System Works | naomigd | | |
| ggxxrlo | Guilty Gear XX #Reload (Japan) (GDL-0019) | 2003 | Arc System Works | ggxxrl | ggxxrl | |
| ggxxsla | Guilty Gear XX Slash (Japan, Rev A) (GDL-0033A) | 2005 | Arc System Works | naomigd | | |
| ghalien | Heiankyo Alien (Gakken) | 1980 | Gakken | | | |
| ghlpanic | Ghoul Panic (World, OB2/VER.A) | 1999 | Eighting / Raizing / Namco | | | |
| ghoshunt | Ghost Hunter | 1996 | Hanaho Games | | | |
| ghostb | The Real Ghostbusters (US 2 Players, revision 2) | 1987 | Data East USA | | | |
| ghostb2a | The Real Ghostbusters (US 2 Players) | 1987 | Data East USA | ghostb | ghostb | |
| ghostb3 | The Real Ghostbusters (US 3 Players, revision 3B?) | 1987 | Data East USA | ghostb | ghostb | |
| ghostb3a | The Real Ghostbusters (US 3 Players, revision 2) | 1987 | Data East USA | ghostb | ghostb | |
| ghostlop | Ghostlop (prototype) | 1996 | Data East Corporation | neogeo | | |
| ghostmun | Ghost Muncher | 1981 | bootleg (Leisure and Allied) | puckman | puckman | |
| ghostsev | Ghost Squad Evolution | 2007 | Sega | lindbios | | |
| ghostsqo | Ghost Squad (GDX-0012) | 2004 | Sega | ghostsqu | ghostsqu | |