Desarrolladores de Steam con la letra O
| Nombre | Recuento de aplicaciones |
|---|---|
| Obsidian Entertainment | 104 |
| OVERKILL - a Starbreeze Studio. | 84 |
| Oleg Sereda | 83 |
| Orange_Juice | 59 |
| owlyboi | 50 |
| Overhead Games | 48 |
| Osmose Studio | 46 |
| Octo Games | 30 |
| Owlcat Games | 28 |
| Other Ocean Interactive | 26 |
| Ocean Software | 23 |
| ONGAKUKAN Co.,Ltd. | 21 |
| Oxide Games | 21 |
| One More Level | 21 |
| OnSkull Games | 20 |
| Offworld Industries | 20 |
| Objectif 3D | 20 |
| Orangepixel | 19 |
| Overaction Game Studio | 17 |
| Onyx Lute | 17 |