| Name | Description | Year | Manufacturer | Rom | Clone | Sample |
| astannie | Asteroid Annie and the Aliens | 1980 | Gottlieb | gts1 | | genpin |
| astdelux | Asteroids Deluxe (rev 3) | 1980 | Atari | | | |
| astdelux1 | Asteroids Deluxe (rev 1) | 1980 | Atari | astdelux | astdelux | |
| astdelux2 | Asteroids Deluxe (rev 2) | 1980 | Atari | astdelux | astdelux | |
| asterion | Asterion | 1980 | bootleg? (Olympia) | astrof | astrof | astrof |
| asterix | Asterix (ver EAD) | 1992 | Konami | | | |
| asterixaad | Asterix (ver AAD) | 1992 | Konami | asterix | asterix | |
| asterixeaa | Asterix (ver EAA) | 1992 | Konami | asterix | asterix | |
| asterixeac | Asterix (ver EAC) | 1992 | Konami | asterix | asterix | |
| asterixj | Asterix (ver JAD) | 1992 | Konami | asterix | asterix | |
| asterock | Asterock (Sidam bootleg of Asteroids) | 1979 | bootleg (Sidam) | asteroid | asteroid | |
| asterockv | Asterock (Videotron bootleg of Asteroids) | 1979 | bootleg (Videotron) | asteroid | asteroid | |
| asteroid | Asteroids (rev 4) | 1979 | Atari | | | |
| asteroid1 | Asteroids (rev 1) | 1979 | Atari | asteroid | asteroid | |
| asteroid2 | Asteroids (rev 2) | 1979 | Atari | asteroid | asteroid | |
| asteroidb1 | Asteroids (bootleg on Lunar Lander hardware, set 1) | 1979 | bootleg | asteroid | asteroid | |
| asteroidb2 | Asteroids (bootleg on Lunar Lander hardware, set 2) | 1979 | bootleg | asteroid | asteroid | |
| astinvad | Astro Invader | 1980 | Konami (Stern Electronics license) | kamikaze | kamikaze | invaders |
| astinvadb | Astro Invader (bootleg) | 1980? | bootleg | kamikaze | kamikaze | invaders |
| astoneag | Stone Age (Astro, Ver. EN.03.A, 2005/02/21) | 2005 | Astro Corp. | | | |
| astoneag_aa05h | Stone Age (Astro, Ver. AA.05.H, 2007/03/15) | 2007 | Astro Corp. | astoneag | astoneag | |
| astorm | Alien Storm (World, 2 Players) (FD1094 317-0154) | 1990 | Sega | | | |
| astorm3 | Alien Storm (World, 3 Players) (FD1094 317-0148) | 1990 | Sega | astorm | astorm | |
| astorm3d | Alien Storm (World, 3 Players) (bootleg of FD1094 317-0148 set) | 1990 | bootleg | astorm | astorm | |
| astormb2 | Alien Storm (bootleg, set 2) | 1990 | bootleg | astorm | astorm | |
| astormbl | Alien Storm (bootleg, set 1) | 1990 | bootleg | astorm | astorm | |
| astormj | Alien Storm (Japan, 2 Players) (FD1094 317-0146) | 1990 | Sega | astorm | astorm | |
| astormjd | Alien Storm (Japan, 2 Players) (bootleg of FD1094 317-0146 set) | 1990 | bootleg | astorm | astorm | |
| astormu | Alien Storm (US, 3 Players) (FD1094 317-0147) | 1990 | Sega | astorm | astorm | |
| astormud | Alien Storm (US, 3 Players) (bootleg of FD1094 317-0147 set) | 1990 | bootleg | astorm | astorm | |
| astrass | Astra SuperStars (J 980514 V1.002) | 1998 | Sunsoft | stvbios | | |
| astrians | Astrians (clone of Swarm) | 1980 | bootleg (BGV Ltd.) | galaxian | galaxian | |
| astro | Astro | 1979 | Kosmos | | | |
| astro_cpucode | Astro CPU Code | | | | | |
| astroamb | Astro Ambush (Scramble bootleg on Galaxian hardware) | 1981 | bootleg (U.C.E.) | scramble | scramble | |
| astrob | Astro Blaster (version 3) | 1981 | Sega | | | |
| astrob_audio | Astro Blaster Sound Board | | | | | |
| astrob1 | Astro Blaster (version 1) | 1981 | Sega | astrob | astrob | |
| astrob2 | Astro Blaster (version 2) | 1981 | Sega | astrob | astrob | |
| astrob2a | Astro Blaster (version 2a) | 1981 | Sega | astrob | astrob | |
| astrob2b | Astro Blaster (version 2b) | 1981 | Sega | astrob | astrob | |
| astrobf | Astro Blaster (French) | 1981 | Sega | astrob | astrob | |
| astrobg | Astro Blaster (German) | 1981 | Sega | astrob | astrob | |
| astrocade_accessory_port | Bally Astrocade Accessory Port | | | | | |
| astrocade_br16 | Bally Astrocade Blue RAM 16K | | | | | |
| astrocade_br32 | Bally Astrocade Blue RAM 32K | | | | | |
| astrocade_br4 | Bally Astrocade Blue RAM 4K | | | | | |
| astrocade_cart_slot | Bally Astrocade Cartridge Slot | | | | | |
| astrocade_cass | Bally Astrocade Cassette | | | | | |
| astrocade_ctrl_port | Bally Astrocade Control Port | | | | | |
| astrocade_exp | Bally Astrocade expansion | | | | | |
| astrocade_io | Astrocade Custom I/O | | | | | |
| astrocade_joy | Bally Astrocade Joystick | | | | | |
| astrocade_lightpen | Bally Astrocade Light Pen | | | | | |
| astrocade_lwr | Bally Astrocade Lil' White RAM 32K | | | | | |
| astrocade_rl64 | Bally Astrocade R&L RAM 64K | | | | | |
| astrocade_rom | Bally Astrocade Standard Carts | | | | | |
| astrocade_rom_256k | Bally Astrocade 256K Carts | | | | | |
| astrocade_rom_512k | Bally Astrocade 512K Carts | | | | | |
| astrocade_rom_cass | Bally Astrocade AstroBASIC Cart | | | | | |
| astrocade_vs1 | Bally Astrocade Viper System 1 | | | | | |
| astrocde | Bally Professional Arcade | 1978 | Bally Manufacturing | | | |
| astrocdl | Bally Home Library Computer | 1977 | Bally Manufacturing | astrocde | astrocde | |
| astrocdw | Bally Computer System | 1977 | Bally Manufacturing | astrocde | astrocde | |
| astrocmd | Astro Command | 1982 | Epoch | | | |
| astrof | Astro Fighter (set 1) | 1979 | Data East | | | astrof |
| astrof2 | Astro Fighter (set 2) | 1979 | Data East | astrof | astrof | astrof |
| astrof3 | Astro Fighter (set 3) | 1979 | Data East | astrof | astrof | astrof |
| astroff | Astro Fighter (Famaresa bootleg, set 1) | 1979 | bootleg (Famaresa) | astrof | astrof | astrof |
| astroff2 | Astro Fighter (Famaresa bootleg, set 2) | 1979 | bootleg (Famaresa) | astrof | astrof | astrof |
| astrofl | Astro Flash (Japan) | 1986 | Sega | transfrm | transfrm | |
| astroft | Astro Fighter (Taito) | 1979 | Data East (Taito license) | astrof | astrof | astrof |
| astron | Astron Belt | 1983 | Sega | | | |
| astronp | Astron Belt (Pioneer LDV1000) | 1983 | Sega | astron | astron | |
| astropal | Astropal | 1980? | Sidam? | | | |
| astrowar | Astro Wars | 1980 | Zaccaria / Zelco | | | |
| astyanax | The Astyanax (EPROM version) | 1989 | Jaleco | | | |
| astyanaxa | The Astyanax (mask ROM version) | 1989 | Jaleco | astyanax | astyanax | |
| asuka | Asuka & Asuka (World) | 1988 | Taito Corporation | | | |
| asukaj | Asuka & Asuka (Japan, rev 1) | 1988 | Taito Corporation | asuka | asuka | |
| asukaja | Asuka & Asuka (Japan) | 1988 | Taito Corporation | asuka | asuka | |
| asurabld | Asura Blade - Sword of Dynasty (Japan) | 1998 | Fuuki | | | |
| asurabus | Asura Buster - Eternal Warriors (USA) | 2001 | Fuuki | | | |
| asurabusj | Asura Buster - Eternal Warriors (Japan, set 1) | 2000 | Fuuki | asurabus | asurabus | |
| asurabusja | Asura Buster - Eternal Warriors (Japan, set 2) | 2000 | Fuuki | asurabus | asurabus | |
| asurabusjr | Asura Buster - Eternal Warriors (Japan) (ARCADIA review build) | 2000 | Fuuki | asurabus | asurabus | |
| asuscubx | CUBX | 2000 | ASUS | | | |
| asuscusc | Terminator P-3 "Cusc" (SiS630 chipset) | 2001 | Asus | | | |
| asuspolo | Polo "Genie" (SiS630 chipset) | 2001 | Asus | | | |
| asylum | Asylum (prototype) | 1991 | Leland Corporation | | | |
| at | PC/AT (6 MHz, MF2 Keyboard) | 1987 | <generic> | ibm5170 | ibm5170 | |
| at_keyb | AT Keyboard | | | | | |
| at_keybc | PC/AT Keyboard Controller | | | | | |
| at_mb | PC/AT Motherboard | | | | | |
| at28c16 | AT28C16 2Kx8 EEPROM | | | | | |
| at28c64b | AT28C64B 8Kx8 EEPROM | | | | | |
| at29c020 | ATMEL 29C020 256Kx8 FEEPROM | | | | | |
| at29c040 | ATMEL 29C040 512Kx8 FEEPROM | | | | | |
| at29c040a | ATMEL 29C040A 512Kx8 FEEPROM | | | | | |
| at386 | PC/AT 386 (12 MHz, MF2 Keyboard) | 1988 | <generic> | ibm5170 | ibm5170 | |
| at386sx | PC/AT 386SX (16 MHz, MF2 Keyboard) | 1988 | <generic> | ibm5170 | ibm5170 | |
| at45db041 | AT45DB041 | | | | | |
| at45db081 | AT45DB081 | | | | | |
| at45db161 | AT45DB161 | | | | | |
| at486 | PC/AT 486 (25 MHz, MF2 Keyboard) | 1990 | <generic> | ibm5170 | ibm5170 | |
| at586 | PC/AT 586 (PIIX4) | 1990 | <generic> | ibm5170 | ibm5170 | |
| at586x3 | PC/AT 586 (PIIX3) | 1990 | <generic> | ibm5170 | ibm5170 | |
| at89c4051 | Atmel AT89C4051 | | | | | |
| at89c52 | Atmel AT89C52 | | | | | |
| at89s52 | Atmel AT89S52 | | | | | |
| ata_interface | ATA Interface | | | | | |
| ata_slot | ATA Connector | | | | | |
| atacf | ATA CompactFlash Card | | | | | |
| ataflash | ATA Flash PC Card | | | | | |
| atakaast | Ataka asteroidov | 1992 | bootleg (Elektronika) | gnw_mmouse | gnw_mmouse | |
| atamanot | Computer Quiz Atama no Taisou (Japan) | 1983 | Yachiyo Denki / Uni Enterprise | | | |
| ataqandr | Ataque Androide - Moon Cresta (FAR S.A. Spanish bootleg) | 1980? | bootleg (FAR S.A.) | mooncrst | mooncrst | |
| atari_cage | Atari CAGE | | | | | |
| atari_cage_seattle | Atari CAGE Seattle | | | | | |
| atari_cx85 | Atari CX85 Numeric Keypad | | | | | |
| atari_dpc | Atari DPC | | | | | |
| atari_fdc | Atari FDC (HLE) | | | | | |
| atari_maria | Atari MARIA | | | | | |
| atari_rle | Atari RLE Motion Objects | | | | | |
| atari_trakball | Atari CX22/CX80 Trak-Ball | | | | | |
| atari1050 | Atari 1050 Dual Density Disk Drive | | | | | |
| atari810 | Atari 810 Disk Drive | | | | | |
| atariabc286 | ABC-286/30 | 1989 | Atari | ibm5170 | ibm5170 | |
| atarians | The Atarians | 1976 | Atari | | | genpin |
| atarifb | Atari Football (revision 2) | 1978 | Atari | | | |
| atarifb1 | Atari Football (revision 1) | 1978 | Atari | atarifb | atarifb | |
| atarifb2 | Atari Football II | 1978 | Atari | atarifb | atarifb | |
| atarifb4 | Atari 4 Player Football | 1979 | Atari | atarifb | atarifb | |
| atarimo | Atari Motion Objects | | | | | |
| ataripc1 | PC1 | 1987 | Atari | ibm5150 | ibm5150 | |
| ataripc3 | PC3 | 1988 | Atari | ibm5150 | ibm5150 | |
| ataripc4 | PC4 | 1987 | Atari | ibm5170 | ibm5170 | |
| ataripc5 | PC5 | 1988 | Atari | ibm5170 | ibm5170 | |
| atarisac | Atari SAC Sound Board | | | | | |
| atariscom | Atari Sound Communications | | | | | |
| atarisy1 | Atari System 1 BIOS | 1984 | Atari Games | | | |
| atarivad | Atari VAD | | | | | |
| ataxx | Ataxx (rev 5) | 1990 | Leland Corporation | | | |
| ataxx_80186_sound | 80186 DAC (Ataxx) | | | | | |
| ataxxa | Ataxx (rev 4) | 1990 | Leland Corporation | ataxx | ataxx | |
| ataxxe | Ataxx (Europe) | 1990 | Leland Corporation | ataxx | ataxx | |
| ataxxj | Ataxx (Japan) | 1990 | Leland Corporation (Capcom license) | ataxx | ataxx | |
| atc1415 | ATC-1415 | 199? | A-Trend | ibm5170 | ibm5170 | |
| atc1425a | ATC-1425A (SiS 85C496/85C497) | 1995 | A-Trend | | | |
| atc1425b | ATC-1425B (SiS 85C496/85C497) | 1996 | A-Trend | | | |
| atehate | Athena no Hatena? | 1993 | Athena | | | |
| atetb3482 | Tetris (bootleg set 6, with UM3482) | 1988 | bootleg | atetris | atetris | |
| atetb5205 | Tetris (bootleg set 7, with OKI M5205) | 1988 | bootleg | atetris | atetris | |
| atetris | Tetris (set 1) | 1988 | Atari Games | | | |
| atetrisa | Tetris (set 2) | 1988 | Atari Games | atetris | atetris | |
| atetrisb | Tetris (bootleg set 1) | 1988 | bootleg | atetris | atetris | |
| atetrisb2 | Tetris (bootleg set 2) | 1988 | bootleg | atetris | atetris | |
| atetrisb3 | Tetris (bootleg set 3) | 1988 | bootleg | atetris | atetris | |
| atetrisb4 | Tetris (bootleg set 4) | 1988 | bootleg | atetris | atetris | |
| atetrisb5 | Tetris (bootleg set 5) | 1988 | bootleg | atetris | atetris | |
| atetrisbp | Tetris (bartop, prototype) | 1989 | Atari Games | atetris | atetris | |
| atetrisc | Tetris (cocktail set 1) | 1989 | Atari Games | atetris | atetris | |
| atetrisc2 | Tetris (cocktail set 2) | 1989 | Atari Games | atetris | atetris | |
| atgame40 | 40 Bonus Games in 1 (AtGames) | 2012 | AtGames | | | |
| athena | Athena | 1986 | SNK | | | |
| athenab | Athena (bootleg) | 1986 | bootleg | athena | athena | |
| athlonxp | Amd Athlon XP | | | | | |
| ati_vga | ATi VGA i/f | | | | | |
| atjsa1 | Atari JSA I Sound Board | | | | | |
| atjsa2 | Atari JSA II Sound Board | | | | | |
| atjsa3 | Atari JSA III Sound Board | | | | | |
| atjsa3s | Atari JSA IIIs Sound Board | | | | | |
| atkgld | All the King's Gold (0152152, US) | 2007 | Aristocrat | aristmk6 | | |
| atla_ltd | Atlantis (LTD) | 1981 | LTD | | | genpin |
| atlantca | Atlantica (Russia) (Atronic) (set 1) | 2002 | Atronic | | | |
| atlantcaa | Atlantica (Russia) (Atronic) (set 2) | 2002 | Atronic | atlantca | atlantca | |
| atlantip | Atlantis (rev. 3) | 1989 | Bally | | | genpin |
| atlantis | Battle of Atlantis (set 1) | 1981 | Comsoft | | | |
| atlantis2 | Battle of Atlantis (set 2) | 1981 | Comsoft | atlantis | atlantis | |
| atlantisb | Battle of Atlantis (bootleg) | 1981 | bootleg | atlantis | atlantis | |
| atlantol | Atlant Olimpic (Italian bootleg) | 1996 | bootleg | trackfld | trackfld | |
| atleta | Atleta | 1991 | Inder | | | genpin |
| atm | ATM-Turbo (ATM-CP) | 1991 | MicroART | spec128 | spec128 | |
| atm18mcc | ATM18 Mini Chess Computer (English) | 2009 | Elektor | | | |
| atmega1280 | Atmel ATmega1280 | | | | | |
| atmega168 | Atmel ATmega168 | | | | | |
| atmega2560 | Atmel ATmega2560 | | | | | |
| atmega328 | Atmel ATmega328 | | | | | |
| atmega644 | Atmel ATmega644 | | | | | |
| atmega88 | Atmel ATmega88 | | | | | |
| atmel_29c010 | Atmel 29C010 Flash | | | | | |
| atmel_29c020 | Atmel 29C020 Flash | | | | | |
| atmel_49f4096 | Atmel AT49F4096 Flash | | | | | |
| atmtb2 | ATM-Turbo 2 | 1992 | MicroART | spec128 | spec128 | |
| atmtb2plus | ATM-Turbo 2+ | 1993 | MicroART | spec128 | spec128 | |
| atom | Atom | 1979 | Acorn Computers | | | |
| atom_discpack | Atom Disc Pack | | | | | |
| atom_econet | Atom Econet Interface | | | | | |
| atom_gdos | Atom GDOS | | | | | |
| atom_gdos2015 | Atom GDOS-2015 | | | | | |
| atom_mdcr | Atom MDCR | | | | | |
| atom_sid | AtomSID | | | | | |
| atom_speech | Atom Speech Synthesis Module | | | | | |
| atom_switch | Atom EPROM Switch Card | | | | | |
| atom_tube | Atom Tube Interface | | | | | |
| atom_vdu80 | Atom EF9345 80 Column Card | | | | | |
| atombbc | Atom with BBC Basic | 1982 | Acorn Computers | atom | atom | |
| atombjt | Atom (bootleg of Bombjack Twin) | 1993 | bootleg (Kyon K.) | bjtwin | bjtwin | |
| atomboy | Atomic Boy (revision B) | 1985 | Irem (Memetron license) | wilytowr | wilytowr | |
| atomboya | Atomic Boy (revision A) | 1985 | Irem (Memetron license) | wilytowr | wilytowr | |
| atomes | ES5700 (LED Electronic Message System) | 198? | Pearce Signs | atom | atom | |
| atomicp | Atomic Point (Korea) | 1990 | Philko | | | |
| atompunk | Atomic Punk (US) | 1991 | Irem America (licensed from Hudson Soft) | dynablst | dynablst | |
| atomrr | Atom with RAMROM | 2014 | Acorn Computers | atom | atom | |
| ator | Ator (set 1, 2 bumpers) | 1985 | Video Dens | | | genpin |
| ator3bmp | Ator (set 2, 3 bumpers) | 1985 | Video Dens | ator | ator | genpin |
| atrbonpk | Bonus Poker (Atronic) | 200? | Atronic | | | |
| atrbtlma | Beetlemania (Atronic) | 2002 | Atronic | | | |
| atricmon | I C Money (Atronic) (set 1) | 200? | Atronic | | | |
| atricmona | I C Money (Atronic) (set 2) | 200? | Atronic | atricmon | atricmon | |
| atronic | Atronic SetUp/Clear Chips (Russia, set 1) | 1999 | Atronic | | | |
| atronica | Atronic SetUp/Clear Chips (Russia, set 2) | 1999 | Atronic | atronic | atronic | |
| atronicb | Atronic SetUp/Clear Chips | 1999 | Atronic | atronic | atronic | |
| atrwild | Wild Thing (Atronic) | 200? | Atronic | | | |
| att4425 | AT&T Teletype 4425 | 1983 | AT&T | | | |
| att610 | 610 Business Communication Terminal | 1986 | AT&T | | | |
| att615 | 615 MT | 1987 | AT&T | | | |
| att630 | 630 MTG | 1986 | AT&T | | | |
| att730x | 730X | 1990 | AT&T | | | |
| attache | Attaché | 1982 | Otrona | | | |
| attache816 | Attaché 8:16 | 1983 | Otrona | attache | attache | |
| attack | Attack | 1980 | Playmatic | | | genpin |
| attackf | Attack (bootleg of Defender) | 1980 | bootleg (Famaresa) | defender | defender | |
| attackfc | Attack Force (encrypted) | 1979? | Electronic Games Systems | | | |
| attackfcu | Attack Force (unencrypted) | 1979? | bootleg? | attackfc | attackfc | |
| attckexd | Attack (set 1) | 1977 | Exidy | | | |
| attckexd2 | Attack (set 2) | 1977 | Exidy | attckexd | attckexd | |
| attckufo | Attack UFO | 1980 | Ryoto Electric Co. | | | |
| attila | Attila The Hun | 1984 | Game Plan | | | genpin |
| attiny15 | Atmel ATtiny15 | | | | | |
| atturbo | PC/AT Turbo (12 MHz, MF2 Keyboard) | 1987 | <generic> | ibm5170 | ibm5170 | |
| atvtrack | ATV Track (set 1) | 2002 | Gaelco | | | |
| atvtracka | ATV Track (set 2) | 2002 | Gaelco | atvtrack | atvtrack | |
| atworld | Around The World (Version 1.4R CGA) | 2007 | Amcoe | | | |
| atworldd1 | Around The World (Version 1.3R CGA) | 2007 | Amcoe | atworld | atworld | |
| atworlde1 | Around The World (Version 1.3E CGA) | 2007 | Amcoe | atworld | atworld | |
| au | Au (location test) | 1983 | Tehkan | | | |
| aubam12s2 | BAM/12-S2 | 198? | AUVA COMPUTER, INC. | ibm5170 | ibm5170 | |
| audiowerk2 | Emagic Audiowerk2 Digital Audio Recording | | | | | |
| aurail | Aurail (set 3, US) (unprotected) | 1990 | Sega / Westone | | | |