 | Obduction Game Details | Review | Screens | Cyan | 7/10 |  |
 | Observation Game Details | Review | Screens | Devolver Digital | 8/10 |  |
 | Oceanhorn: Monster of Uncharted Seas Game Details | Review | Screens | Cornfox & Bros. | 7/10 |  |
 | OCO Game Details | Review | Screens | SPECTRUM48 | 7/10 |  |
 | Octodad: Dadliest Catch Game Details | Review | Screens | Young Horses | 8/10 |  |
 | Octopath Traveler Game Details | Review | Screens | Square Enix | 8/10 |  |
 | Octopath Traveler II Game Details | Screens | Square Enix | |  |
 | Oddworld: Abe's Oddysee - New 'n' Tasty! Game Details | Review | Screens | Oddworld Inhabitants | 7/10 |  |
 | Odysseus Kosmos and his Robot Quest: Episode 1 Game Details | Review | Screens | HeroCraft | 7/10 |  |
 | Of Kings and Men Game Details | Preview | Screens | Green Man Gaming Publishing | |  |
 | Offworld Trading Company Game Details | Review | Screens | Stardock Entertainment | 7/10 |  |
 | Oh Mai Tiara - The Road for Love Game Details | Preview | Screens | Gogen Soft | |  |
 | Oh My Godheads Game Details | Screens | Square Enix | |  |
 | Old Man's Journey Game Details | Review | Screens | Broken Rules | 6/10 |  |
 | Old Skies Game Details | Preview | Screens | Wadjet Eye | |  |
 | OlliOlli Game Details | Review | Screens | Devolver Digital | 7/10 |  |
 | Omega Pattern Game Details | Screens | Borokai Studio | |  |
 | Omega Zodiac Game Details | Review | Screens | Proficient City | 3/10 |  |
 | Omen of Sorrow Game Details | Review | Screens | EastAsiaSoft Limited | 5/10 |  |
 | Omensight Game Details | Review | Screens | Spearhead | 6/10 |  |
 | Omnis: The Erias Line Game Details | Preview | Screens | Elyn | |  |
 | One Dog Story Game Details | Review | Screens | Big Way | 6/10 |  |
 | One Piece: Burning Blood Game Details | Review | Screens | Bandai Namco | 6/10 |  |
 | One Piece: Unlimited World Red Game Details | Review | Screens | Bandai Namco | 7/10 |  |
 | One Upon Light Game Details | Review | Screens | Rising Star Games | 7/10 |  |
 | One Way Heroics Game Details | Review | Screens | Playism | 5/10 |  |
 | OneShot Game Details | Review | Screens | Degica | 8/10 |  |
 | Ookibloks Game Details | Review | Screens | Skyboy | 7/10 |  |
 | Operation Babel: New Tokyo Legacy Game Details | Screens | NIS America | |  |
 | Oppaidius Desert Island! Game Details | Review | Preview | Screens | Vittorio Giorgi | 6/10 |  |
 | Oppaidius Summer Trouble! Game Details | Review | Screens | Vittorio Giorgi | 7/10 |  |
 | Oppaidius Tropical Cruise! Game Details | Review | Screens | Vittorio Giorgi | 7/10 |  |
 | Orcs Must Die! Game Details | Review | Screens | Robot | 7/10 |  |
 | Order of the Thorne The King's Challenge Game Details | Review | Screens | Infamous Quests | 4/10 |  |
 | Ori and the Blind Forest Game Details | Review | Screens | Microsoft Game Studios | 9/10 |  |
 | Ori and the Will of the Wisps Game Details | Review | Screens | Xbox Game Studios | 9/10 |  |
 | Oriental Empires Game Details | Review | Screens | Iceberg | 5/10 |  |
 | Original Journey Game Details | Review | Screens | Another Indie | 5/10 |  |
 | Out of Order Game Details | Review | Screens | Hungry Software | 8/10 |  |
 | Out There Game Details | Review | Screens | Mi-Clos Studio | 5/10 |  |
 | Outbuddies Game Details | Review | Screens | Headup | 6/10 |  |
 | Outland Game Details | Review | Screens | Housemarque | 8/10 |  |
 | Outriders Game Details | Review | Screens | Square Enix | 5/10 |  |
 | Outward Game Details | Review | Preview | Screens | Deep Silver | 4/10 |  |
 | Overcooked Game Details | Review | Screens | Team17 | 8/10 |  |
 | Overfall Game Details | Review | Preview | Screens | Pera Games | 7/10 |  |
 | Overgrowth Game Details | Review | Screens | Wolfire | 6/10 |  |
 | Overwatch Game Details | Review | Screens | Blizzard | 8/10 |  |