Linux

One Step From Eden

Thomas Moon Kang · 2020

OneShot

Future Cat · 2016

Oniken

JoyMasher · 2012

Oniria Crimes

Ckolmos · 2020

Only If

Creability · 2014

Onsen Master

Waking Oni Games · 2022

Oort Online

Wonderstruck Games

Open Ocarina

Blake Warner · 2022

OpenTTD

OpenTTD Team · 2004

Opus Magnum

Zachtronics · 2017

Orange Season

Innerfire Studios · 2024

Oratorio

Orebody · 2023

Orbit.Industries

LAB132 · 2022

Orborun

Digerati Distribution · 2013

Orbz

21-6 Productions · 2002

Orchids to Dusk

Pol Clarissou · 2015

Ord.

Mujo Games · 2019

Orebital Dynamics

Brainoid Games

Organ Trail: Director's Cut

The Men Who Wear Many Hats · 2012

Orion Trail

Schell Games · 2015

Orison of Mercury

dualhammers · 2015

Orwell: Ignorance is Strength

Osmotic Studios · 2018

Orwell: Keeping an Eye on You

Osmotic Studios · 2016

Orx

Johnbell · 2022