C64 Game Index
O
- O'Riley's Mine
- Oasis Shalimar
- Ocean Conqueror
- Ocean Ranger
- Octapolis
- Odysseus Trojan Warrior
- Odyssey
- Oel
- Ograton
- Oh No
- Oil Barons
- Oil Imperium
- Oil's Well
- Oink
- Ole
- Olli And Lissa
- Olli and Lissa 3
- Olo
- Olympic Skier
- Omega
- Omega Force One
- Omega Mission
- Omega Race
- Omidar
- On Field Football
- On Ice
- On Track Racing
- On-Court Tennis
- One Armed Bandit
- One Man and His Droid
- One on One
- Ooops Up
- Ooze
- Operation Cyborg
- Operation Hanoi
- Operation Hongkong
- Operation Hormuz
- Operation Ironhawk
- Operation Neptun
- Operation Thunderbolt
- Operation Whirlwind
- Operation Wolf
- Opium
- Oracle 2
- Orange Squash
- Orb
- Orbitron
- Orbits
- Orc Attack
- Orin 1
- Orion
- Ormus Saga
- Ormus Saga 2
- Orpheus in Underworld
- Orsital
- Oskar
- Oslo Bors
- Ostfrieslandgames
- Othello
- Out On the Tiles
- Out Run
- Out Run Europa
- Out Take 2
- Out of Deep
- Out of This World
- Out on a Limb
- Outback
- Outlaw
- Outlaws
- Over the Net
- Overlander
- Overload
- Overlord
- Oxxonian