| Beer | Brewery | Style | ABV |
|---|---|---|---|
| Open Eye Signal | Whiplash | English IPA | 8.2% |
| Open Fermented Saison | Floodland Brewing | Saison | 2.9% |
| Open Sails | TrimTab Brewery | Wild Ale | 8.0% |
| Open Season | Rainwater Brewing | ||
| Open skies | Brouwerij Frontaal | New England IPA | 8.5% |
| Open Spaces | Side Project | Flanders Red Ale | |
| Open up & love again | The Veil Brewing Company | Wild Ale | |
| Open Up More | Anchorage Brewing Co | American Strong Ale | 15.5% |
| Open-fermented Barleywine | Zillicoah Beer Company | English Barleywine | 11.1% |
| Openfaced | To Øl | English Brown Ale | 9.0% |
| Opéra Framboise | brasseurs Simple Malt | 11.4% | |
| Opera Omnia | Brujos Brewing | American Imperial Stout | 12.9% |
| Operation CoHoperation | Lupulin Brewing/Barrel Theory | 8.0% | |
| Operation Cohoperation | Mumford Brewing | Imperial IPA | 8.0% |
| Operation Doomsday | Brouwerij Frontaal | New England IPA | 8.5% |