| File | Size | Last Modified |
|---|---|---|
| Obake no Q Tarou - Wanwan Panic.nes | 40.02 KB | Jun 20th 2000 at 11:58pm |
| Obocchama-kun.nes | 256.02 KB | Jun 20th 2000 at 11:58pm |
| Ochin ni Toshi Puzzle Tonjan!.nes | 256.02 KB | Jun 21st 2000 at 12:01am |
| Oeka Kids - Anpanman no Hiragana Daisuki.nes | 128.02 KB | Jun 7th 2006 at 2:49pm |
| Oeka Kids - Anpanman to Oekaki Shiyou!.nes | 128.02 KB | Jun 7th 2006 at 2:49pm |
| Oishinbo.nes | 256.02 KB | Jun 20th 2000 at 11:58pm |
| Olympic IQ.nes | 96.02 KB | Nov 30th 2004 at 4:37am |
| Olympus no Tatakai.nes | 128.02 KB | Jun 20th 2000 at 11:58pm |
| Onyanko Town.nes | 40.02 KB | Jun 20th 2000 at 11:58pm |
| Operation Secret Storm (Rus).nes | 128.02 KB | May 8th 2010 at 3:32am |
| Operation Secret Storm.nes | 128.02 KB | Jun 20th 2000 at 11:58pm |
| Operation Wolf.nes | 256.02 KB | Jun 20th 2000 at 11:58pm |
| Orb 3D.nes | 192.02 KB | Jun 20th 2000 at 11:58pm |
| Osomatsu-kun.nes | 256.02 KB | Jun 20th 2000 at 11:58pm |
| Otaku no Seiza - An Adventure in the Otaku Galaxy.nes | 384.02 KB | Jun 20th 2000 at 11:58pm |
| Othello.nes | 40.02 KB | Jun 20th 2000 at 11:58pm |
| Outlanders.nes | 128.02 KB | Jun 20th 2000 at 11:58pm |
| Over Horizon.nes | 256.02 KB | Aug 19th 2005 at 6:35pm |
| Overlord (Rus).nes | 256.02 KB | May 8th 2010 at 3:32am |
| Overlord.nes | 256.02 KB | Jul 8th 2006 at 10:32pm |