Ori and the Blind Forest
Ori and the Blind Forest is a bit of a genremix of strong platforming and light RPG elements, all set within an atmospheric world.
Oort Online is a massively multiplayer game set in a sandbox universe of connected voxel worlds.
Orcs Must Die! Unchained
Orcs Must Die! Unchained is a fast-paced Fortress Siege action game in which teams of heroes battle head-to-head to attack and defend ancient strongholds.
Only if is a short surreal adventure puzzle game developed by Creability.
Oddworld: Abe's Oddysee - New 'n' Tasty
Oddworld: Abe's Oddysee - New 'n' Tasty is a classic platformer where you must rescue your fellow meat factory slaves.