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