| Game | Submitted By | Download! |
| O Zone, The Recorded using Rollback | Paul E. Collins | Download (53KB) | Watch Video | WoS page | Spectrum Computing page  |
| O.K. Yah! Recorded using Rollback | Rafal | Download (100KB) | Watch Video | WoS page | Spectrum Computing page |
| Oberon 69 Recorded using Rollback | Rafal | Download (200KB) | Watch Video | WoS page | Spectrum Computing page |
| Oblivion Recorded using Rollback | Albert Valls | Download (265KB) | Watch Video | WoS page | Spectrum Computing page |
| Ocean Dancer Recorded using Rollback | Daren | Download (29KB) | Watch Video | WoS page | Spectrum Computing page |
| Oceano More info. Recorded using Rollback | Albert Valls | Download (38KB) | Watch Video | Spectrum Computing page |
| Octan Recorded using Rollback | Albert Valls | Download (179KB) | Watch Video | WoS page | Spectrum Computing page |
| Octopussy | Matthew Smolko & Pavel Plíva | Download (175KB) | Watch Video | WoS page | Spectrum Computing page |
| OctuKitty More info. Recorded using Rollback | Solaris104 | Download (82KB) | Watch Video | Spectrum Computing page |
| Odd Job Eddie | Paul E. Collins | Download (56KB) | Watch Video | WoS page | Spectrum Computing page |
| Oddi the Viking Recorded using Rollback | Pavel Plíva | Download (297KB) | Watch Video | WoS page | Spectrum Computing page |
| Official Father Christmas Game, The Recorded using Rollback | Rafal | Download (57KB) | Watch Video | WoS page | Spectrum Computing page |
| Ogerox More info. Recorded using Rollback | Pavel Plíva | Download (90KB) | Watch Video | Spectrum Computing page |
| Ognom | Opraks | Download (76KB) | WoS page | Spectrum Computing page |
| Oh Mummy | Paul E. Collins | Download (25KB) | Watch Video | WoS page | Spectrum Computing page |
| Oh Shit! Recorded using Rollback | Paul E. Collins | Download (25KB) | WoS page | Spectrum Computing page |
| Oink! Only plays back in Fuse and InkSpector 2. See the enclosed text file. | Mark Incley | Download (454KB) | Watch Video | WoS page | Spectrum Computing page |
| Old Tower More info. Recorded using Rollback | Pavel Plíva | Download (112KB) | Watch Video | Spectrum Computing page |
| Ole, Toro | Ivan Sanchez | Download (159KB) | Watch Video | WoS page | Spectrum Computing page |
| Olimpo en Guerra Recorded using Rollback | ruben_ | Download (46KB) | WoS page | Spectrum Computing page |
| Olli & Lissa Recorded using Rollback | Fil and Grant Percival (no rollback) | Download (352KB) | Watch Video | WoS page | Spectrum Computing page |
| Olli & Lissa 3 Recorded using Rollback | Pavel Plíva | Distribution Denied | Watch Video | WoS page | Spectrum Computing page |
| Olli & Lissa 2: Halloween Recorded using Rollback | Pavel Pliva | Download (326KB) | Watch Video | WoS page | Spectrum Computing page |
| Olympiad '86 Recorded using Rollback | Malcolm | Download (38KB) | WoS page | Spectrum Computing page |
| Olympic Challenge Recorded using Rollback | Albert Valls | Download (171KB) | Watch Video | WoS page | Spectrum Computing page |
| Olympicon Recorded using Rollback | Albert Valls | Download (233KB) | Watch Video | WoS page | Spectrum Computing page |
| Olympimania Recorded using Rollback | Albert Valls | Download (70KB) | Watch Video | WoS page | Spectrum Computing page |
| Omega Dimension Recorded using Rollback | Rafal | Download (125KB) | Watch Video | WoS page | Spectrum Computing page |
| Omega One Recorded using Rollback | xmikex and Jamie Angus | Download (909KB) | Watch Video | WoS page | Spectrum Computing page |
| Omelettes For Breakfast More info. Recorded using Rollback | Pavel Plíva | Download (89KB) | Watch Video | Spectrum Computing page |
| On Reflection Recorded using Rollback | Paul E. Collins | Download (151KB) | Watch Video | WoS page | Spectrum Computing page |
| On the Road Recorded using Rollback | Pavel Plíva | Download (201KB) | Spectrum Computing page |
| On the Run Recorded using Rollback | xmikex and Jamie Angus | Download (311KB) | Watch Video | WoS page | Spectrum Computing page |
| One for the Road Recorded using Rollback | Paul E. Collins | Download (63KB) | WoS page | Spectrum Computing page |
| One of our Wombats is Missing Recorded using Rollback | Paul E. Collins | Download (46KB) | WoS page | Spectrum Computing page |
| Ooze More info. Recorded using Rollback | Albert Valls | Download (91KB) | Watch Video | Spectrum Computing page |
| Operacion Conquista | mike_myers | Download (12KB) | WoS page | Spectrum Computing page |
| Operation Berlin Recorded using Rollback | Paul E. Collins | Download (91KB) | WoS page | Spectrum Computing page |
| Operation Gunship Recorded using Rollback | Albert Valls | Distribution Denied | Watch Video | WoS page | Spectrum Computing page |
| Operation Hanoi Recorded using Rollback | Rafal | Download (210KB) | Watch Video | WoS page | Spectrum Computing page |
| Operation Nightingale Recorded using Rollback | Paul E. Collins | Download (62KB) | WoS page | Spectrum Computing page |
| Operation Red Refrigerator Russian arcade adventure | Viktor Drozd | Download (1386KB) | Watch Video | WoS page | Spectrum Computing page |
| Operation Stallion Recorded using Rollback | Paul E. Collins | Download (85KB) | WoS page | Spectrum Computing page |
| Operation Thunderbolt Recorded using Rollback | xmikex and Jamie Angus | Download (345KB) | Watch Video | WoS page | Spectrum Computing page |
| Operation Thunderbowel Recorded using Rollback | Paul E. Collins | Download (47KB) | WoS page | Spectrum Computing page |
| Operation Wolf | Philip Kendall | Download (116KB) | Watch Video | WoS page | Spectrum Computing page |
| Operation: Labyrinth Fall More info. Recorded using Rollback | Pavel Plíva | Download (86KB) | Watch Video | Spectrum Computing page |
| Oppressed Land, The Recorded using Rollback | Paul E. Collins | Download (38KB) | Watch Video | WoS page | Spectrum Computing page |
| OPZ More info. Recorded using Rollback | Pavel Plíva | Download (23KB) | Watch Video | Spectrum Computing page |
| Oracle's Cave, The Recorded using Rollback | Damian Morrison | Download (130KB) | Watch Video | WoS page | Spectrum Computing page |
| Orb Quest Recorded using Rollback | Paul E. Collins | Download (118KB) | WoS page | Spectrum Computing page |
| Orc Attack | mike_myers | Download (107KB) | WoS page | Spectrum Computing page |
| Orc Island Recorded using Rollback | Andy Ford | Download (37KB) | Watch Video | WoS page | Spectrum Computing page |
| Orc Slayer Recorded using Rollback | Paul E. Collins | Download (27KB) | WoS page | Spectrum Computing page |
| Order of Sleeping Dragon, The More info. Recorded using Rollback | Pavel Plíva | Download (329KB) | Watch Video | Spectrum Computing page |
| Oriental Games Recorded using Rollback | Rafal | Download (166KB) | Watch Video | WoS page | Spectrum Computing page |
| Oriental Hero Recorded using Rollback | Rickard Berglind | Download (60KB) | Watch Video | WoS page | Spectrum Computing page |
| Orion | Fil | Download (103KB) | Watch Video | WoS page | Spectrum Computing page |
| Orson Powell: Lycanthropus Recorded using Rollback | Paul E. Collins | Download (31KB) | WoS page | Spectrum Computing page |
| Ossuary Recorded using Rollback | Jim Waterman | Download (141KB) | Watch Video | WoS page | Spectrum Computing page |
| Ostrov Kanibalu Recorded using Rollback | Pavel Plíva | Download (35KB) | WoS page | Spectrum Computing page |
| Ostrov pokladu Czech text adventure. Recorded using Rollback | Pavel Plíva | Download (75KB) | Spectrum Computing page |
| Out of Africa Recorded using Rollback | Rafal | Download (33KB) | Watch Video | WoS page | Spectrum Computing page |
| Out of the Limelight Recorded using Rollback | Paul E. Collins | Download (57KB) | WoS page | Spectrum Computing page |
| Out of This World Recorded using Rollback | Rafal | Download (467KB) | Watch Video | WoS page | Spectrum Computing page |
| Out Run Recorded using Rollback | xmikex | Download (277KB) | Watch Video | WoS page | Spectrum Computing page |
| Out Run Europa Recorded using Rollback | Rafal | Download (874KB) | Watch Video | WoS page | Spectrum Computing page |
| Outcast Recorded using Rollback | Rafal | Download (170KB) | Watch Video | WoS page | Spectrum Computing page |
| Outlaw Recorded using Rollback | Rafal | Download (55KB) | Watch Video | WoS page | Spectrum Computing page |
| Overdog Recorded using Rollback | Paul E. Collins | Download (46KB) | WoS page | Spectrum Computing page |
| Overlander Recorded using Rollback | Daren | Download (300KB) | Watch Video | WoS page | Spectrum Computing page |
| Oxygen Alert Recorded using Rollback | Albert Valls | Download (36KB) | WoS page | Spectrum Computing page |