| Oceanhorn 2: Knights of the Lost Realm | Cornfox & Bros. | 5/10 | |
| Oceanhorn: Monster of Uncharted Seas | Cornfox & Bros. | 7/10 | |
| Oceanhorn: Monster of Uncharted Seas (Second Opinion) | Cornfox & Bros. | 6/10 | |
| Oceanhorn: Monster of Uncharted Seas | Cornfox & Bros. | 5/10 | |
| Oceanhorn: Monster of Uncharted Seas | Cornfox & Bros. | 7/10 | |
| Oceanhorn: Monster of Uncharted Seas | Cornfox & Bros. | 6/10 | |
| Offworld Trading Company | Stardock Entertainment | 7/10 | |
| Ogre Battle 64: Person of Lordly Caliber | Square Enix | 8/10 | |
| OlliOlli2: XL Edition | Team17 | 7/10 | |
| Omen of Sorrow | EastAsiaSoft Limited | 5/10 | |
| Onechanbara Z2: Chaos | NIS America | 6/10 | |
| Order of the Thorne: The King’s Challenge | Infamous Quests | 4/10 | |
| Ori and the Will of the Wisps | Xbox Game Studios | 9/10 | |
| Ori and the Will of the Wisps | Xbox Game | 9/10 | |
| Out of Ammo | Zen | 2/10 | |
| Out of Order | Hungry Software | 8/10 | |
| Outlast 2 | Red Barrels | 5/10 | |
| Outlast 2 | Red Barrels | 6/10 | |
| Outlast: Bundle of Terror | Red Barrels | 7/10 | |
| Overcooked! 2 | Team17 | 8/10 | |
| Overcooked! 2 – Surf 'n' Turf | Team17 | 7/10 | |