| Old Godfather | Speakeasy Ales and Lagers | | 10.2% |
| Old Godfather (Bourbon Barrel Aged) | Speakeasy Ales and Lagers | American Barleywine | 9.5% |
| Old Golden Hen | Morland and Co. | English Bitter | 4.1% |
| Old Grimmaster | American Solera | American Barleywine | 13.0% |
| Old Grinderface | Schooner Exact Brewing Company | American Barleywine | 9.9% |
| Old Grizzly | Elk Valley Brewing Company | | 12.0% |
| Old Growler | Nethergate Brewery Co Ltd | American Porter | 6.5% |
| Old Growth Imperial Stout | Caldera Brewing | Russian Imperial Stout | 8.8% |
| Old Growth Imperial Stout (Bourbon Barrel Aged) | Caldera Brewing | American Imperial Stout | 8.8% |
| Old Growth Wild Ale | Trinity Brewing Company | Flanders Oud Bruin | 5.5% |
| Old Grumpler | Avery Brewing Company | Old Ale | 17.2% |
| Old Grundy Humper | Smuttlabs | English Barleywine | 10.8% |
| Old Guardian Barley Wine Style Ale | Stone Brewing | American Barleywine | 11.0% |
| Old Guardian Barley Wine Style Ale - Extra Hoppy | Stone Brewing | American Barleywine | 11.0% |
| Old Guardian Barley Wine Style Ale Aged In Temecula Red Wine Barrels | Stone Brewing | American Barleywine | 10.5% |