Here is the full list of all 22 Bardbarian achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Do all the things! 100% Completion.
Post a score in the Day 2 Insane Mode leaderboard. The most exclusive of all leaderboards.
Fact: There are 1609 meters in a mile.
Complete the entire campaign from start to finish without dying.
Start a new game in Insane Mode.
Unlock the mythical 4th party slot.
Loot 100,000 gold from the corpses of your fallen enemies.
Complete the "night" chapter.
Send 2500 enemies to their grave.
Complete the "evening" chapter.
Don't get hit!
Go as fast as you possibly can. (Hint: Upgrade + Song)
Waltz into Wave 10 and rescue him from that Fire Golem.
Complete the "noon" chapter.
Something's cooking on the title screen.
Upgrade a unit to MAX level.
Appears randomly in Survival mode. May luck be with you.
Play and submit your best time for Survival Mode.
Last for 3 minutes in survival mode.
Reach 3000m in Escape mode, and he's yours.
You look lonely, have you considered a pet to keep you company?
Complete the "morning" chapter.