Odysseus Kosmos and his Robot Quest

HeroCraft·Action-Adventure

Oddworld: Stranger's Wrath HD

Oddworld Inhabitants, Inc. Oddworld Inhabitants, Inc.·2020·3D Platformers

Oddworld: Soulstorm

Microids·2022·3D Platformers

Oddmar

MobGe·2020·3D Platformers

OddBallers

Ubisoft·2023·3D Platformers

OCTOPATH TRAVELER

Nintendo·2018·Action-Adventure

OCTOPATH TRAVELER II

SQUARE ENIX·2023·Action-Adventure

OCTOPATH TRAVELER 0

SQUARE ENIX·2025·Action-Adventure

Octogeddon

All Yes Good·2019·action

Octodad: Dadliest Catch

Young Horses, Inc.·2017·action

Octo Curse

Ocean Media, intellis d.o.o., Edenap·2023·3D Platformers

Octahedron: Transfixed Edition

Square Enix·2019·3D Platformers

OctaFight

Silesia Games Sp. z o.o.·2020·Wrestling & Boxing

Oceanhorn — Monster of Uncharted Seas

FDG Entertainment·2017·Action-Adventure

Oceanhorn 2: Knights of the Lost Realm

Cornfox & Bros.·2020·action

Ocean's Heart

Nordcurrent·2022·action

Observer

Bloober Team·2019·Action-Adventure

Observer

Bloober Team·2019·Action-Adventure

OBAKEIDORO 2: Chase & Seek

FREESTYLE·2026·3D Platformers

OBAKEIDORO!

FREESTYLE·2019·3D Platformers

Oaken

Goblinz Studio, Surefire Games·2023·RTS & Tactics

OU

Yokaze·2023·Action-Adventure

OTTTD: Over The Top Tower Defence

SMG Studio·2019·action

mcOsu (хоумбрю)

McKay42·2007·Rhythm Games

OS Omega

RockGame·2021·action

OPUS: Prism Peak

Shueisha Games, Flyhigh Works·2026·Action-Adventure

OMG! Zombies

Ghostlight·2019·action

OFF (с переводом)

Fangamer·2025·Action-Adventure

OFF

Fangamer·2025·Action-Adventure

O---O

Art Games Studio·2021·action

Nyan Cat: Lost in Space

isTom Games Ltd.·2019·3D Platformers

NUTS

Noodlecake·2021·Action-Adventure