||[[Obliterator]]|| 1989 || Melbourne House ||No|| Converted by Phantomz || [[Media:Obliterator.rar| Obliterator.rar]]
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||[[Oceanov1.1]]|| 2015 || Egotrip ||No|| Converted by CraigsBar<br/>Version 1.1 || [[Media:Oceano.rar | Oceano.rar]]
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||[[Off Shore Warrior]]|| 1989 || Titus ||No|| Converted by Phantomz || [[Media:Off Shore Warrior.rar | Off Shore Warrior.rar]]
||[[Official Father Christmas]]|| 1989 || Alternative Software ||No|| Converted by dragon || [[Media:Official Father Christmas.rar | Official Father Christmas.rar]]
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||[[Oh Mummy !]]|| 1984 || Amsoft ||No|| Converted by Phantomz<br/>Press Joy1 Button 1 to Bypass Highscore Table J1B1 = Skip highscore table || [[Media:Oh Mummy !.rar | Oh Mummy !.rar]]
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||[[On The Run]]|| 1985 || Design Design ||No|| Converted by Phantomz<br/>Use Joypad joypad 2 and the Console Pause Button for Menu Options. J2B1=Sound Onon/Off off || [[Media:On The Run.rar | On The Run.rar]]
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||[[One Man And His Droid]]|| 1985 || Mastertronic ||No|| Converted by token<br/>C64 screen as loading screen. || [[Media:One Man And His Droid.rar | One Man And His Droid.rar]]
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||[[Operation Alexandra(v1.1)]]|| 2018 || 4mhz ||No|| Converted by CraigsBar<br/>Version 1.1 || [[Media:Operation Alexandra.rar | Operation Alexandra.rar]]
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||[[Operation Gunship]]|| 1989 || Codemasters Software ||No|| Converted by Phantomz<br/>J1B2=Bombs, J2B1=Pause/Unpause, J2B2=Skip Levels<br/>GX4000 , Pausebutton =Quit Gamegame. || [[Media:Operation Gunship.rar | Operation Gunship.rar]]
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||[[Operation Hanoi]]|| 1990 || Players Premier ||No || Converted by Phantomz || [[Media:Operation Hanoi.rar | Operation Hanoi.rar]]
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||[[Operation Thunderbolt]]|| 1989 || Ocean Software ||No|| Converted by Urusergi & Phantomz<br/>Contains both Includes standard CPC and CPC+ versionofficial cartridge versions.<br/>Crosshairs Hackhack =Crosshairs always turned on || [[Media:Operation Thunderbolt.rar | Operation Thunderbolt.rar]]
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||[[Operation Wolf]]|| 1988 || Ocean Software ||No|| Converted by Urusergi & Phantomz<br/>Contains Includes Musicman3512 Introintro<br/>Cheat Trainer: J1 UPJ1UP =YESYes,DOWNJ1DN =NO ; No<br/> Menu : J1 B1J1B1 =1,B2J1B2 =2<br/>Ingame : J1 B1=Shoot, B2J1B2 =Grenade, GX4000 PAUSEPause button =Pause || [[Media:Operation Wolf.rar | Operation Wolf.rar]]
|-
||[[OPQA vs QAOP - The Final Battle]]|| 2018 || Manuel Sagra || Yes (Palette) || Converted by Ayor61<br/>CPC+ palette color upgrade<br/>From CPCRetroDev 2018 || [[Media:OPQA vs QAOP - The Final Battle.rar | OPQA vs QAOP - The Final Battle.rar]]