| XS Old Crustacean | Rogue Ales | American Barleywine | 10.8% |
| XS Old Crustacean Barleywine 2010 | Rogue Ales | American Barleywine | 11.2% |
| XS Old Crustacean Barleywine 2012 | Rogue Ales | American Barleywine | 11.5% |
| XS Old Crustacean Barleywine 2013 | Rogue Ales | | |
| XTra | Brasserie Thiriez | | 4.5% |
| Xtra Brut | Gooische Bierbrouwerij | Bière de Champagne / Bière Brut | 12.0% |
| Xtra time | New Holland Brewing Company | American Blonde Ale | 4.4% |
| Xtra-Citra Pale Ale | Surly Brewing Co. | American Pale Ale | 4.5% |
| Xtradubl Benthic | Half Acre Beer Company | American Imperial Stout | 13.5% |
| Xtreem Stout | Bierbrouwerij de Eem | | 7.5% |
| XV | Arcadia Brewing | | |
| XV (√225 Saison) | Brasserie des Franches-Montagnes | Saison | 5.0% |
| XV Anniversary Stout | Jackie O's Pub & Brewery | American Imperial Stout | 13.7% |
| XVIII - Anniversary Ale | Firestone Walker Brewing Co. | American Strong Ale | 13.0% |
| XVIII Anniversaire | Saint-Arnould | Doppelbock | 8.2% |