 | Observer | Bloober Team | 6/10 |  |
 | Oceanhorn 2: Knights of the Lost Realm | Cornfox & Bros. | 5/10 |  |
 | Oceanhorn: Monster of Uncharted Seas | Cornfox & Bros. | 7/10 |  |
 | Octahedron: Transfixed Edition | Square Enix | 8/10 |  |
 | Octodad: Dadliest Catch | Young Horses | 7/10 |  |
 | Octopath Traveler | Square Enix | 9/10 |  |
 | Octopath Traveler II | Square Enix | 7/10 |  |
 | Oddworld: Abe's Oddysee - New 'n' Tasty! | Oddworld Inhabitants | 8/10 |  |
 | Oddworld: Munch’s Oddysee | Oddworld Inhabitants | 4/10 |  |
 | Odium to the Core | QubicGames | 5/10 |  |
 | Okami HD | Capcom | 9/10 |  |
 | Old Man's Journey | Broken Rules | 4/10 |  |
 | Old School Musical | Plug In Digital | 9/10 |  |
 | OlliOlli World | Private Division | 9/10 |  |
 | OlliOlli: Switch Stance | Gambitious Digital | 8/10 |  |
 | Olympia Soiree | Aksys | 6/10 |  |
 | Omega Labyrinth Life | D3 Publisher | 8/10 |  |
 | One Night Stand | Ratalaika Games | 6/10 |  |
 | One-Way Ticket | Zodiac Interactive Limited | 8/10 |  |
 | Onimusha: Warlords | Capcom | 7/10 |  |
 | Oninaki | Square Enix | 7/10 |  |
 | Ori and the Blind Forest: Definitive Edition | Xbox Game | 9/10 |  |
 | Othello | Arc System Works | 6/10 |  |
 | Outer Wilds | Annapurna | 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 |  |
 | Overcooked! All You Can Eat | Team17 | 9/10 |  |
 | Overcooked! Special Edition | Team17 | 6/10 |  |
 | Owlboy | D-Pad Studio | 7/10 |  |