Éditeurs de Jeux Steam - Lettre O
| Nom | Nombre d'applications |
|---|---|
| Overbuilt S.A. | 767 |
| OTAKU Plan | 104 |
| Oleg Sereda | 100 |
| Outright Games Ltd. | 79 |
| owlyboi | 54 |
| OKJOY | 45 |
| Octo Games | 31 |
| Owlcat Games | 29 |
| Objectif 3D | 25 |
| Orangepixel | 20 |
| Onyx Lute | 19 |
| Octavi Navarro | 18 |
| OtakuMaker.com | 17 |
| Overaction Game Studio | 17 |
| OnSkull Games | 16 |
| Offworld Industries | 15 |
| okyakusama | 15 |
| OG Games | 14 |
| October Games | 14 |
| Ogre Pixel | 14 |