| ESTUDIO | CONST | MIEMBROS | FUNDADO | LOCALIDAD | ACTIVIDAD | ENLACES |
|---|---|---|---|---|---|---|
| Obscure Tales | 2-5 | 2018 | Sevilla (Sevilla) | |||
| Octavilla Games | 2-5 | 2018 | Sevilla (Sevilla) | |||
| Odders Lab | 26-50 | 2018 | Sevilla (Sevilla) | |||
| Ofihombre | 1 | 2015 | Gata de Gorgos (Alicante) | |||
| Omnimonkey | 2-5 | 2013 | Madrid (Madrid) | |||
| Omnium Lab Studios | 6-10 | 2013 | Algeciras (Cádiz) | |||
| Oniric Factor | 2-5 | 2011 | Sevilla (Sevilla) | |||
| Open & Close | 2023 | Alicante (Alicante) | ||||
| Open House Games | 2-5 | 2019 | Barcelona (Barcelona) | |||
| Orenji Games | 2-5 | 2017 | Valencia (Valencia) | |||
| Otter Worlds Games | 2022 | Madrid (Madrid) | ||||
| Out of the Blue Games | 11-25 | 2018 | Madrid (Madrid) | |||
| Outfit7 Barcelona | 26-50 | 2018 | Barcelona (Barcelona) | |||
| Outlander Games | 2021 | Madrid (Madrid) | ||||
| OveR Software | 2-5 | 2015 | Cartagena (Murcia) | |||
| Over the Top Games | 6-10 | 2008 | Madrid (Madrid) | |||
| OverPowered Team | 2-5 | 2014 | Madrid (Madrid) |