| Game Name | System |
|---|
| On The Box (Ace) (sp.ACE) (set 7) | MAME |
| On The Box (Ace) (sp.ACE) (set 8) | MAME |
| On The Box (Ace) (sp.ACE) (set 9) | MAME |
| On The Buses (Maygay) (M1A/B) (set 1) | MAME |
| On The Buses (Maygay) (M1A/B) (set 10) | MAME |
| On The Buses (Maygay) (M1A/B) (set 11) | MAME |
| On The Buses (Maygay) (M1A/B) (set 12) | MAME |
| On The Buses (Maygay) (M1A/B) (set 13) | MAME |
| On The Buses (Maygay) (M1A/B) (set 14) | MAME |
| On The Buses (Maygay) (M1A/B) (set 15) | MAME |
| On The Buses (Maygay) (M1A/B) (set 16) | MAME |
| On The Buses (Maygay) (M1A/B) (set 17) | MAME |
| On The Buses (Maygay) (M1A/B) (set 2) | MAME |
| On The Buses (Maygay) (M1A/B) (set 3) | MAME |
| On The Buses (Maygay) (M1A/B) (set 4) | MAME |
| On The Buses (Maygay) (M1A/B) (set 5) | MAME |
| On The Buses (Maygay) (M1A/B) (set 6) | MAME |
| On The Buses (Maygay) (M1A/B) (set 7) | MAME |
| On The Buses (Maygay) (M1A/B) (set 8) | MAME |
| On The Buses (Maygay) (M1A/B) (set 9) | MAME |
| On The Fiddle (Barcrest) (MPU5) (set 1) | MAME |
| On The Fiddle (Barcrest) (MPU5) (set 2) | MAME |
| On The Oche (1984)(Artic Computing) | ZX Spectrum (TAP) |
| On The Oche (1984)(Artic Computing) | ZX Spectrum Z80 |
| On The Piste (Ace) (sp.ACE) (set 1) | MAME |
| On The Piste (Ace) (sp.ACE) (set 10) | MAME |
| On The Piste (Ace) (sp.ACE) (set 11) | MAME |
| On The Piste (Ace) (sp.ACE) (set 12) | MAME |
| On The Piste (Ace) (sp.ACE) (set 13) | MAME |
| On The Piste (Ace) (sp.ACE) (set 14) | MAME |
| On The Piste (Ace) (sp.ACE) (set 15) | MAME |
| On The Piste (Ace) (sp.ACE) (set 16) | MAME |
| On The Piste (Ace) (sp.ACE) (set 17) | MAME |
| On The Piste (Ace) (sp.ACE) (set 2) | MAME |
| On The Piste (Ace) (sp.ACE) (set 3) | MAME |
| On The Piste (Ace) (sp.ACE) (set 4) | MAME |
| On The Piste (Ace) (sp.ACE) (set 5) | MAME |
| On The Piste (Ace) (sp.ACE) (set 6) | MAME |
| On The Piste (Ace) (sp.ACE) (set 7) | MAME |
| On The Piste (Ace) (sp.ACE) (set 8) | MAME |
| On The Piste (Ace) (sp.ACE) (set 9) | MAME |
| On The Run (1985)(Design Design Software) | ZX Spectrum Z80 |
| On The Run (1985)(Design Design Software) | ZX Spectrum (TAP) |
| On The Run (1985)(Design Design Software)[a] | ZX Spectrum Z80 |
| On The Run (1985)(Design Design Software)[a] | ZX Spectrum (TAP) |
| On The Run (UK) (1985) | CPC |
| On The Up (Mazooma) (Scorpion 4) (set 1) | MAME |
| On The Up (Mazooma) (Scorpion 4) (set 2) | MAME |
| On the Ball (Europe) | SNES |
| On the Ball (USA) | SNES |
| On the Ball - World Cup Edition | Amiga |
| On the Oche (UK) (1984) | CPC |
| On the Road | Amiga |
| On the Road (1990)(Lifetimes)(Disk 1 of 2) | Atari ST |
| On the Road (1990)(Lifetimes)(Disk 2 of 2) | Atari ST |
| On the Road (1990)(Lifetimes)(de)(Disk 1 of 2) | Atari ST |
| On the Road (1990)(Lifetimes)(de)(Disk 2 of 2) | Atari ST |
| On-Track Computer Model Car Racing (1985)(Gamestar)[m Yogi][k-file] | Atari 800 |
| Once a King v2 (1988-03-24)(Lavery, Darryn - Griffiths, Mark)(FW) | Atari ST |
| Ondra | MAME |
| Ondra ViLi | MAME |
| One (Japan) | PSX |
| One (UK) (1986) | CPC |
| One (USA) | PSX2PSP |
| One (USA, Europe) (Demo) (v0.48) | NGage |
| One (USA, Europe) (En,Fr,De,Es,It) (Full Trial) (v0.45) | NGage |
| One (USA, Europe) (En,Fr,De,Es,It) (Review Kit 1) (v0.38) | NGage |
| One (USA, Europe) (En,Fr,De,Es,It) (Review Kit 179) (v0.39) | NGage |
| One (USA, Europe) (En,Fr,De,Es,It) (Review Kit 6) (v0.45) | NGage |
| One (USA, Europe) (En,Fr,De,Es,It) (v0.45) | NGage |
| One + Two | MAME |
| One + Two (earlier) | MAME |
| One Arm Bandit (1985)(Argus Press Software) | ZX Spectrum Z80 |
| One Day Cricket (19xx)(Paladin)(PD) | Atari ST |
| One For The Road (1986)(IJK Software) | ZX Spectrum (TAP) |
| One For The Road (1986)(Tynesoft) | ZX Spectrum Z80 |
| One Last Game (1984)(Bevan Technology)[ONELAST start] [SSD] | BBC Micro |
| One Last Game (1984)(Bevan Technology)[a][ONELAST start] [SSD] | BBC Micro |
| One Last Game (1984)(Bevan Technology)[h TSTH][bootfile] [SSD] | BBC Micro |
| One Last Game (1984)(Bevan Technology)[h TSTH][t][bootfile] [SSD] | BBC Micro |
| One Life | Atari 800 |
| One Man And His Droid (1985)(Mastertronic) | ZX Spectrum Z80 |
| One Man And His Droid (1985)(Mastertronic)[a2] | ZX Spectrum Z80 |
| One Man And His Droid (1985)(Mastertronic)[a3] | ZX Spectrum Z80 |
| One Man And His Droid (1985)(Mastertronic)[a4] | ZX Spectrum Z80 |
| One Man And His Droid (1985)(Mastertronic)[a] | ZX Spectrum Z80 |
| One Man and His Droid & Le Millionnaire (F) | CPC |
| One Man and His Droid (1985)(Mastertronic) | ZX Spectrum (TAP) |
| One Man and His Droid (E) | C64 Tapes |
| One Man and His Droid (UK) (1985) | CPC |
| One Man and His Droid (UK) (1985) [a1] | CPC |
| One Man and His Droid (UK) (1985) [a2] | CPC |
| One Man and his Droid (1986)(Mastertronic)(PAL)[k-file] | Atari 800 |
| One Must Fall (1992)(Rob Elam) | DOS |
| One Must Fall 2097 (1994)(Diversions Entertainment) | DOS |
| One Must Fall 2097 (1994)(Epic Megagames Inc) | DOS |
| One Must Fall 2097 Original Install (1994)(Diversions Entertainment) | DOS |
| One Of Our Wombats Is Missing (1990)(Zenobi Software) | ZX Spectrum Z80 |
| One Of Our Wombats Is Missing (1990)(Zenobi Software)[a] | ZX Spectrum Z80 |
| One On One (1983)(Ariolasoft UK) | ZX Spectrum Z80 |
