Here is the full list of all 25 Epic Tavern achievements.
Have six males and six females on your Roster
Recruit 20 Orcs
Recruit 20 Dwarves
Recruit 20 Humans
Equip character with all new armor (Weapon, Armor, Accessory)
Raise an Adventurer to Level 5
Raise an Adventurer to Level 10
Complete Prologue Quest
Complete Flaming Gate Quest Chain
Recruit Cranston Grimm
Complete all Ramsey Volk Quests
Have a Patron pass out from Drunkenness
Complete 20 Quests
Have 5 Parties Wipe
Take 100% of the Party Loot
Take 100% of the Party Loot 10 Times
Serve 100 drinks in your Tavern
Serve 1000 drinks in your Tavern
Serve 5000 drinks in your Tavern
Give Adventuring party 100% of the Loot
Give Adventuring party 100% of the Loot 10 Times
Have a party consisting of at least 1 Dwarf, 1 Human, and 1 Orc
Win Every Encounter on a Quest
A Patron rejected food/drink offers 5 times in a row
Have a Necromancer raise Skeletons during