Steamデベロッパー O - ページ 19
| 名称 | アプリ数 |
|---|---|
| ocasocreations | 3 |
| OperaHouse Corporation | 3 |
| Oblivionburn Productions | 3 |
| Oliver Orangers | 3 |
| Oki Aki | 3 |
| One Joyful Day | 2 |
| Opera Soft | 2 |
| OMNIViOLET | 2 |
| Onion Cocktail Games | 2 |
| Operasoft | 2 |
| Orbital Express | 2 |
| Oilcatz | 2 |
| Oribe Ware | 2 |
| One Slice of Pizza Games | 2 |
| Ouatte | 2 |
| Ornbjorn | 2 |
| Otakulah | 2 |
| Orc Chop Games | 2 |
| Orius Games | 2 |
| Olinick Games | 2 |