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