| Name | Country | Type | Alc. | Appearance | Aroma | Volume | Taste | Average |
| Obolon Premium | Ukraine | Pale Lager | 5,2% | 7 | 8 | 6 | 6 | 6,8 |
| Oettinger Mixed | Germany | Fruitbeer | 2,5% | 7 | 5 | 5 | 5 | 5,5 |
| Oettinger Pils | Germany | Pilsener | 4,7% | 7 | 7 | 8 | 9 | 7,8 |
| O'Hanlons Wheat Beer | England | American Wheat | 4% | 9 | 8 | 8 | 8 | 8,3 |
| Okocim O.K. Beer | Poland | Premium Lager | 5,6% | 7 | 7 | 7 | 7 | 7 |
| Old Danish Beer | Denmark | Ale | 10,2% | 10 | 8 | 10 | 10 | 9,5 |
| Ölvisholt Fósturlandsins Freyja | Iceland | Wheat Ale | 4,5% | 9 | 10 | 8 | 8 | 8,8 |
| Ölvisholt Jólaöl | Iceland | Abbey Dubbel | 7% | 9 | 9 | 10 | 10 | 9,5 |
| Ölvisholt Lava | Iceland | Imperial Stout | 9,4% | 8 | 10 | 9 | 8 | 8,8 |
| Ölvisholt Mori | Iceland | Bitter | 5,5% | 10 | 10 | 9 | 9 | 9,5 |
| Ölvisholt Skjálfti | Iceland | Premium Lager | 5% | 9 | 10 | 10 | 10 | 9,8 |
| Ommegang Abbey Ale | USA | Abbey Dubbel | 8,5% | 9 | 9 | 9 | 9 | 9 |
| Omnipollo Fatamorgana Oat/Wheat IIPA | Sweden | Double IPA | 8% | 7 | 9 | 8 | 8 | 8 |
| Orkney Dark Island Reserve | Scotland | Barley Wine | 10% | 10 | 10 | 10 | 10 | 10 |
| Orkney Dragonhead Stout | Scotland | Stout | 4% | 9 | 10 | 7 | 7 | 8,3 |
| Orkney Skull Splitter | Scotland | Barley Wine | 8,5% | 8 | 9 | 9 | 9 | 8,8 |
| Orval | Belgium | Trappist | 6,2% | 10 | 9 | 9 | 8 | 9 |
| Ozujsko Pivo | Croatia | Pilsener | 5,2% | 7 | 6 | 7 | 6 | 6,5 |