- Ordne Die Bunten Bälle
- Ordne Die Bunten Bälle LT
- Ore Blast Mania
- Organ Trail: Director's Cut
- Organic Fanatic
- Organic Pop
- Organoid VR Training Game
- Orgo Tutor: Chemistry Isomers
- Oriel Llythrennau Unigol
- Orient Express Dominoes
- Orient Express: The Train Simulator
- Origame
- Origami - Origami Art
- Origami Challenge
- Origami Math
- Origami Paper Art game no WiFi
- Origami Race
- Origami Slicer
- Orna: Turn based GPS RPG
- Ornament Buster
- Oro - Visual Music
- OROBOROS
- OROCHI in the HELL
- Orthographe au CE1
- Orthographe au CE2
- Ortografía Paso a Paso
- Ortografía Paso a Paso School
- Ortona Game
- Orwell's Animal Farm
- Orwell: Keeping an Eye on You
- Orzmic
- Orðagull
- Orðaleikurinn
- OS Andar Bahar
- Os Caçadores de Lendas
- OS Poker