| Oil | — | — | Partial |
| Oil Wars Handyshareportal.de (IlluS) | — | — | Partial |
| Oilrig (2002 Kiloo Oil Rig is a trademark of Kiloo) | — | — | Partial |
| Oilrig (Kalo) | — | — | Partial |
| Oilrig (Kiloo) | — | — | Partial |
| Ojo Negro (Elkware) | — | — | Partial |
| Oka60 (Fco.Javier Rodriguez Mesa) | — | — | Partial |
| Okey (casusnet.com) | — | — | Partial |
| Okezie Bolt 2.52 Handler UI (Bitstream [HandlerUI-Mod]) | — | — | Partial |
| Okezie Facebook Chat (OkezieWAP) | — | — | Partial |
| Okezie N- Player (OkezieWAP) | — | — | Partial |
| Oliver | — | — | Partial |
| Olympic Hero (Javagamesunlimited.blogspot.com) | — | — | Partial |
| Olympic Hurdles | — | — | Partial |
| Olympic Long Jump | — | — | Partial |
| Olympic Panic luan17 | — | — | Partial |
| Olympic Panic luan17 (Vendor) | — | — | Partial |
| Olympic Sports (Acotel) | — | — | Partial |
| Olympic Stick Race (JTwoMeGames) | — | — | Partial |
| Om Kick Off (Mediaplazza) | — | — | Partial |
| Omega Mission (Jacado) | — | — | Partial |
| Omega Shooting (RockstarFunplay) | — | — | Partial |
| Omega Shooting Fighter Edition (Solar Labs) | — | — | Partial |
| Omni Flash Full Version (MAX Mobile Application Xpert) | — | — | Partial |
| Omnicide (NitraGames) | — | — | Partial |
| Omod421beta24 Handler UI (Opera Software ASA [HandlerUI-Mod]) | — | — | Partial |
| On The Other Side | — | — | Partial |
| On The Race (TheKoolApps) | — | — | Partial |
| On Track | — | — | Partial |
| On Track (Danny Pozin) | — | — | Partial |
| On Track1 | — | — | Partial |
| One Dish Meals N30 | — | — | Partial |
| One Fifth (GTS) | — | — | Partial |
| One Land (TianTeng Tech) | — | — | Partial |
| One Man Army | — | — | Partial |
| One Man Army (Fugumobile) | — | — | Partial |
| One Man Army (Fugumobile) 1 | — | — | Partial |
| One Man Army (Fugumobile)1 | — | — | Partial |
| One Man Army (Fugumobile)a | — | — | Partial |
| One Man Army (RockstarFunplay) | — | — | Partial |
| One Man Army (Sensible Mobile) | — | — | Partial |
| One Man Army Attack (Laaba Studio) | — | — | Partial |
| One Man War (RTM Games) | — | — | Partial |
| One Man Zone (SM STUDIOS) | — | — | Partial |
| One Way | — | — | Partial |
| Onimusha Puzzle | — | — | Partial |
| Onimusha Puzzle 1 | — | — | Partial |
| Onimusha Puzzle Dark Castle | — | — | Partial |
| Onimusha Puzzle Dark Castle 1 | — | — | Partial |
| Onimusha Puzzle Dark Castle1 | — | — | Partial |