| Name |
System |
Subsystem |
Players |
Genre |
Release Date |
| Oxyjet | Switch | Download Software | 1 - 4 | Fighting | Dec 13, 2018 |
| O X Logic Puzzle 1000 | Switch | Download Software | 1 | Puzzle | Oct 24, 2019 |
| Oxenfree | Switch | Download Software | 1 | Adventure | Oct 6, 2017 |
| Owlboy | Switch | Download Software | | Action | Feb 13, 2018 |
| Ovivo | Switch | Download Software | 1 | Action | Jul 3, 2019 |
| Overwhelm | Switch | Download Software | 1 - 2 | Action | Apr 4, 2019 |
| Overwatch Legendary Edition | Switch | | | Shooter | Oct 15, 2019 |
| Overwatch 2 | Switch | | 1 | Shooter | TBA |
| OverTop | Switch | | 1 | Racing | Apr 27, 2017 |
| Override: Mech City Brawl | Switch | Download Software | 1 - 4 | Action | Oct 15, 2019 |
| Overpass | Switch | | 1 - 8 | Racing | Mar 17, 2020 |
| Overlanders | Switch | Download Software | 1 | Racing | Nov 14, 2019 |
| Overland | Switch | Download Software | 1 | Adventure | Sep 19, 2019 |
| Overdriven Reloaded: Special Edition | Switch | Download Software | 1 - 4 | Action | Jan 10, 2019 |
| Overcooked: Special Edition | Switch | Download Software | 1 - 4 | Action | Jul 27, 2017 |
| Overcooked 2 | Switch | Download Software | 1 - 4 | Action | Aug 7, 2018 |
| Out There: Ω The Alliance | Switch | Download Software | 1 | Strategy | Apr 9, 2019 |
| Out of the Box | Switch | Download Software | 1 | Strategy | Aug 22, 2018 |
| Out of Space | Switch | Download Software | 1 - 4 | Action | Year 2019 |
| Outlast: Bundle of Terror | Switch | Download Software | 1 | Adventure | Feb 27, 2018 |
| Outlast 2 | Switch | Download Software | 1 | Adventure | Mar 27, 2018 |
| Outbuddies DX | Switch | Download Software | 1 | Adventure | TBA |
| Our World Is Ended | Switch | | 1 | Adventure | Apr 18, 2019 |
| Our Two Bedroom Story | Switch | Download Software | 1 | Adventure | May 7, 2020 |
| Our Flick Erasers | Switch | Download Software | 1 - 4 | Puzzle | Aug 2, 2019 |
| OTTTD: Over The Top Tower Defense | Switch | Download Software | 1 | Strategy | May 6, 2019 |
| Otto | Switch | Download Software | 1 | Puzzle | Jun 8, 2018 |
| Otokomizu | Switch | Download Software | 1 | Action | Oct 31, 2019 |
| Otherworldly | Switch | Download Software | 1 | Adventure | Feb 21, 2020 |
| Othercide | Switch | Download Software | 1 | Adventure | TBA |
| Othello | Switch | Download Software | 1 - 2 | Party/Parlor | Mar 23, 2017 |
| Osyaberi！Kakejyo！～Ubawareta Dot Coin o oe！～ | Switch | Download Software | 1 | Action | Sep 13, 2018 |
| Osyaberi! Horjiyo! | Switch | Download Software | 1 | Action | Mar 8, 2018 |
| Osyaberi! Horijyo! Gekihori Ana Horisuki Uchu Tte Nandeyanen | Switch | Download Software | 1 | Action | Aug 22, 2019 |
| Orn: The Tiny Forest Sprite | Switch | Download Software | 1 | Action | Jan 24, 2020 |
| Original Journey | Switch | Download Software | 1 | Action | TBA |
| Ori and the Blind Forest | Switch | Download Software | 1 | Adventure | Sep 27, 2019 |
| Order Land | Switch | Download Software | 1 | Action | Sep 28, 2017 |
| Orbitblazers | Switch | Download Software | 1 - 2 | Racing | Jan 31, 2020 |
| Opus: The Day We Found Earth | Switch | Download Software | 1 | Adventure | Nov 30, 2017 |
| Opus: Rocket of Whispers | Switch | Download Software | 1 | Adventure | Mar 22, 2018 |
| Operencia: The Stolen Sun | Switch | Download Software | 1 | RPG | Mar 31, 2020 |
| Operation Pig | Switch | Download Software | 1 | Action | Nov 7, 2018 |
| Operation Hardcore | Switch | Download Software | 1 - 2 | Action | Jun 8, 2018 |
| oOo: Ascension | Switch | Download Software | 1 - 2 | Racing | Oct 4, 2018 |
| Oninaki | Switch | | 1 | | Aug 22, 2019 |
| Onimusha Warlords | Switch | Download Software | 1 | Action | Jan 15, 2019 |
| Oniken | Switch | Download Software | 1 | Action | Feb 8, 2019 |
| Onigiri | Switch | Download Software | | RPG | Jan 30, 2019 |
| One-Way Ticket | Switch | Download Software | 1 | Adventure | Nov 28, 2019 |
| One Way Heroics Plus | Switch | Download Software | 1 | RPG | Jun 18, 2020 |
| One Strike | Switch | Download Software | 1 - 2 | Fighting | Jun 7, 2018 |
| One Step From Eden | Switch | Download Software | 1 - 2 | RPG | Mar 26, 2020 |
| ONE PIECE: Unlimited World Red Deluxe Edition | Switch | | | Action | Sep 29, 2017 |
| One Piece Pirate Warriors 4 | Switch | | 1 - 4 | Action | Mar 27, 2020 |
| One Piece Pirate Warriors 3 Deluxe Edition | Switch | | | Action | May 10, 2018 |
| One Person Story | Switch | Download Software | 1 | Action | Nov 8, 2019 |
| One Night Stand | Switch | Download Software | 1 | Adventure | Oct 4, 2019 |
| One More Dungeon | Switch | Download Software | | | Dec 14, 2017 |
| One Finger Death Punch 2 | Switch | Download Software | 1 - 2 | Fighting | Feb 26, 2020 |
| One Eyed Kutkh | Switch | Download Software | 1 | Adventure | Mar 9, 2018 |
| Omvorm | Switch | Download Software | 1 - 2 | Puzzle | Sep 18, 2018 |
| OmoTomO | Switch | Download Software | 1 - 2 | Puzzle | Jan 23, 2020 |
| OMG Zombies! | Switch | Download Software | 1 | Action | Mar 26, 2019 |
| OMG Police - Car Chase TV Simulator | Switch | Download Software | 1 | Racing | Apr 20, 2020 |
| Omensight: Definitive Edition | Switch | Download Software | 1 | Action | Dec 13, 2018 |
| Omen Exitio: Plague | Switch | Download Software | 1 | RPG | Aug 29, 2019 |
| Omega Vampire | Switch | | 1 | Adventure | Aug 29, 2019 |
| Omega Strike | Switch | Download Software | 1 | Action | Dec 24, 2018 |
| Omega Labyrinth Life | Switch | Download Software | 1 | RPG | Aug 1, 2019 |
| Omega Fighter | Switch | ARC | 1 - 2 | Shooter | Jul 26, 2018 |
| Olympia Soiree | Switch | Download Software | 1 | Adventure | Apr 16, 2020 |
| OlliOlli: Switch Stance | Switch | Download Software | 1 - 4 | Sports | Feb 14, 2019 |
| Oliver's Adventures in the Fairyland | Switch | Download Software | 1 | Action | Sep 23, 2019 |
| Old Time Hockey | Switch | Download Software | 1 - 2 | Sports | Cancelled |
| Old School Racer 2 | Switch | Download Software | 1 | Racing | Jan 18, 2019 |
| Old School Musical | Switch | Download Software | 1 - 2 | Rhythm | Sep 13, 2018 |
| Old Man's Journey | Switch | Download Software | 1 | Puzzle | Feb 20, 2018 |
| Okuri Inu | Switch | Download Software | 1 | Adventure | Jul 12, 2018 |
| OkunoKA | Switch | Download Software | 1 | Action | Nov 30, 2018 |
| OK K.O.! Let's Play Heroes | Switch | Download Software | 1 | Action | Oct 30, 2018 |
| Okami HD | Switch | Download Software | 1 | Adventure | Aug 9, 2018 |
| Oh... Sir! The Insult Simulator | Switch | Download Software | 1 - 2 | Simulation | Jan 18, 2018 |
| Oh... Sir! The Hollywood Roast | Switch | Download Software | 1 - 2 | Simulation | Jan 18, 2018 |
| Oh My Godheads: Party Edition | Switch | Download Software | 1 - 4 | Fighting | Sep 25, 2018 |
| Oh! Edo Towns | Switch | Download Software | 1 | Simulation | Aug 8, 2019 |
| Ohayou! Beginner's Japanese | WiiU / Switch | Download Software | 1 | Simulation | TBA |
| Of Mice and Sand Revised | Switch | Download Software | | Action | Jan 11, 2018 |
| Offroad Racing - Buggy X ATV X Moto | Switch | Download Software | 1 | Racing | Apr 23, 2020 |
| Odium To The Core | Switch | Download Software | 1 | Rhythm | Dec 25, 2018 |
| Oddworld: Stranger's Wrath | Switch | Download Software | | | Jan 23, 2020 |
| Oddworld: Munch's Oddysee | Switch | Download Software | 1 | Adventure | May 14, 2020 |
| Oddmar | Switch | Download Software | 1 | Action | Feb 20, 2020 |
| Odallus: The Dark Call | Switch | Download Software | 1 | Action | Feb 8, 2019 |
| Octopath Traveler | Switch | | 1 | RPG | Jul 13, 2018 |
| Octogeddon | Switch | Download Software | 1 | Action | May 16, 2019 |
| Octodad: Dadliest Catch | Switch | Download Software | 1 - 4 | Adventure | Nov 9, 2017 |
| Octocopter: Double or Squids | Switch | Download Software | 1 - 4 | Racing | Apr 5, 2018 |
| Octahedron: Transfixed Edition | Switch | Download Software | 1 | Rhythm | Jan 17, 2019 |
| Oceanhorn: Monster of Uncharted Seas | Switch | Download Software | 1 | Adventure | Jun 22, 2017 |
| Observer | Switch | Download Software | 1 | Adventure | Feb 7, 2019 |
| Obey Me | Switch | Download Software | 1 | Action | TBA |
| Obakeidoro! | Switch | Download Software | 1 - 4 | Action | Aug 1, 2019 |
| Obakeidoro! | Switch | Download Software | 1 - 4 | Party/Parlor | Aug 29, 2019 |
