| Open The Door (SM Studios) | — | — | Partial |
| Opera Mini (Opera Software ASA) | — | — | Partial |
| Opera Mini 4 (Opera Software ASA) | — | — | Partial |
| Opera Mini 4.20 (Opera Software ASA) | — | — | Partial |
| Opera Mini JOVAN (Carbonilla Corporation) | — | — | Partial |
| Opera Mobile (Edition vishal gehlot)(Opera Software ASA) | — | — | Partial |
| Opmod421b25 Handler UI (Opera Software ASA [HandlerUI-Mod]) | — | — | Partial |
| Opnext70 Handler UI (Opera Software ASA [HandlerUI-Mod]) | — | — | Partial |
| Opposite Lock | — | — | Partial |
| Opposite Lock (Numfum) | — | — | Partial |
| Opposite Lock (Numfumdotsis.com) | — | — | Partial |
| Ops Sniper 3D (by GD C)(M3GWORKS Team SaNeC) | — | — | Partial |
| Ops Sniper 3D (M3GWORKS Team) | — | — | Partial |
| Ops Sniper 3D Modern warfare (M3GWORKS Team, Wixel) | — | — | Partial |
| Orcs Elves | — | — | Partial |
| Orcs Elves (6280.6x.to) | — | — | Partial |
| Orcs Elves 1 | — | — | Partial |
| Orcs Elves I I | — | — | Partial |
| Orcs Elves I I (serviak) | — | — | Partial |
| Orcs Elves I I fixed Black Fan | — | — | Partial |
| Orcs Elves II | — | — | Partial |
| Orcs Elves II 1 | — | — | Partial |
| Oregon Trail American Settler | — | — | Partial |
| Orgasm Detector (SOFTGAMES) | — | — | Partial |
| Orgazm (Game Art Studio) | — | — | Partial |
| Orgazm on mobers.ru | — | — | Partial |
| Origoto (Niu Games) | — | — | Partial |
| Orion In The City | — | — | Partial |
| Orion In The City 2 | — | — | Partial |
| Orit Fox Solitaire | — | — | Partial |
| Orit Fox Tetrix | — | — | Partial |
| Orlen Team Dakar 2007 | — | — | Partial |
| Orlen Team Dakar 2007a | — | — | Partial |
| Oro Run (Websurf Tech Co.) | — | — | Partial |
| Oscar's (R) Trivia (Animobile) | — | — | Partial |
| Oskar - and The Collegegirls- CZ E- S40v1- N6230 (N6230) | — | — | Partial |
| Oskar and the Collegegirls (Impossible) | — | — | Partial |
| Oskar2 (Impossible) | — | — | Partial |
| Oskar2 milaro (Impossible) | — | — | Partial |
| Oskar3 (Impossible-Sense) | — | — | Partial |
| Oskar3 (Impossible) | — | — | Partial |
| Ostrov Razvrata | — | — | Partial |
| Otarie Game (Edouard NILSSON Eliza Garden Wireless) | — | — | Partial |
| Othello (ManaStone) | — | — | Partial |
| Othello (Roar Lauritzsen) | — | — | Partial |
| Othello Deluxe 3D | — | — | Partial |
| Ottifanten (game.phonezone.ru-Sense) | — | — | Partial |
| Ottifanten (IECOM) | — | — | Partial |
| Out Of Order | — | — | Partial |
| Out Of Order (Danny Pozin) | — | — | Partial |