- O.V.N.I. Abduction
- O3DX
- Oafmatch
- Oakwood (Update Oct 25, 2019)
- Oakwood Academy of Spells and Sorcery
- OBCIDIAN LEGACY
- Obduction v1.8.4
- OBEN
- OBEY (Build 37r3)
- Obey Me
- Obey Me
- Object “Cleaning”
- Objects in Space v1.0.7
- Obliteracers (Update 1.0.0.3640)
- Oblitus (Patch #2)
- Oblivion Tesseract VR
- Oblivious Garden ~Carmina Burana
- Obscura
- Obscure – Challenge Your Mind
- Obscure Collection
- Obscure II
- Obscure II (Obscure: The Aftermath)
- Obscure Realm
- Obscuritas
- Observation
- Observatory: A VR Variety Pack
- Observer: System Redux
- Observer: System Redux (Update 3)
- Obsideo
- Obsideo
- Obsidian Crown
- Obsolete
- Obulis
- Occult Raise
- Occult RERaise
- Occultus Command
- Occupation 2.5
- Ocean City Racing
- OCEAN CITY RACING: Redux
- Ocean Drive Challenge Remastered
- Ocean Nomad: Survival on Raft
- OCEAN OF BATTLES
- Ocean Rift
- Ocean’s Heart
- Oceanhorn: Monster of Uncharted Seas (Update 08/02/2018)
- OCO
- OctaFight
- OCTAHEDRON
- Octave
- October Night Games
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